The chapter begins with Mio trying to tell Marui how she feels while she has the courage to do it. Seeing the look on her face, Marui says, “Ootaka?” Mio starts to respond, “Marui, I...” but she finds herself being swallowed up by the crowd on the way to see the fireworks. Marui finds her, and tells her not to stray out of sight. He takes her hand, and Mio thinks that when she's in trouble, she's been spoiled by his offering her his hand. She tells him, “I'm sorry! I'm going home,” and runs off through the crowd. Mio thinks thinks that she had a boyfriend (Taki), but also a male friend (Marui) to talk about her worries. That was an ideal situation for her, but Marui's friendliness wasn't just out of friendship. She had to leave, because wanting to keep on like this would be getting greedy... Like those girls (who were talking about her in the last chapter) said earlier... Marui catches up with her, and asks why she suddenly ran off. Did he do something wrong? Mio tells him no – she's the one who did something wrong. This whole time, Taki has been the only thing on her mind. She's been looking for him. Marui tells her that she can't help it, since they did just break up... Mio tells him what she means: “I want you to date a girl who only has eyes for you, Marui,” while thinking that person can't be her. Marui tells her to hold on; she doesn't have to make up her mind now, he can wait for her to get over it... Mio tells him plainly, “We aren't going to be going out. We aren't dating.” She tells him that, until she sees him with someone else who seems to make him happy, she won't be talking with him. She thanks him for everything, and starts to walk away. Marui stops her, saying, “Can I ask one thing? Maybe, if it Taki wasn't around, would you go out with me?” Mio thinks about that: If Taki wasn't around? If it wasn't for Taki, they wouldn't have had those study sessions, and she wouldn't have worried over Taki... And then, would she and Marui have talked like this? Mio answers, “And you, Marui? If Taki-kun wasn't around, would you have started liking me?” She gives him a little bit of a smile, and walks away. That was unbearably painful, but she's certain that the time would have come that she had to make that choice, eventually. She looks up, and the fireworks have started.
As he's leaving, Akane walks up behind Marui and asks him what he's doing. She tells him that everyone from the basketball team wanted to see the fireworks. As she passes by, she teases him that if the girls see him standing there by himself now that the fireworks have started, they'll think he's been dumped. Leaning over the railing, he replies, “It'll look like that, huh? That's what happened...” Surprised, Akane turns back, and says, “Huh?” Meanwhile, Mio looks up and notices that the buildings are already blocking her view of the fireworks. She remembers that she needs to let Shii-chan and the others know that she left, and takes out her phone. Looking at her phone, she's surprised to see she'd received a call from Taki. As she wonders if she should try calling him back, she notices him across the street, running in the other direction. She yells his name, and after a moment, he sees her. She points out the crosswalk they can meet at, but Taki simply jumps the railing and runs through the cars. Mio tells him that was dangerous, considering the traffic... Mio trails off, thinking that she can't believe Taki is really there. He hold out his hand, telling her, “I found it.” Mio asks what he means, then sees the whale charm in his hand. He explains that an elderly woman found it on the staircase, and asked him to return it to Mio. Mio comments on how it's torn up, and Taki adds that the chain is also lost. But, Mio thinks, it came back. Crying, she tells him, “Thank you.”
Blushing, Taki launches into an explanation of his actions. His sister made him see that the break up wasn't for Mio's benefit; he did it because he was scared she would choose Marui and break up with him. He never asked Mio what her feelings were, and came to that conclusion on his own. He tells her he's sorry, and if he was wrong [about her and Marui], he'd like to undo their break-up. Mio wonders: Are they going back to where they were? Mio lowers her head, and tells Taki that his feelings about what was happening with Marui weren't wrong. She needs to apologize. With a sad look, he asks, “...Are you going out with Marui?” She tells him no; she thinks she finally made that clear to Marui, too. But, they can't just go back to how it was... Mio blushes, thinking how Taki came there just to return the charm to her... She tells him, “The truth is that I betrayed your trust. But really, thank you for today.” She starts to leave, thinking that if they did just go back to how they were, she can't trust herself that she wouldn't hurt Taki again, and then she wouldn't be able to forgive herself. Taki yells back, asking if this means that she wasn't thinking about breaking up with him so she could date Marui. She tells him that wasn't the case at all, so Taki asks if that means she doesn't like him now. Mio starts to stammer, “Why would I not...?” He takes hold of her arms, and asks, “Then, you like me?” Mio tells him yes, and he kisses her. As they part, he tells her, “I like you, too. I love you.”
Back on the bridge, Marui tells Akane that since Ootaka and Taki broke up, he figured she was practically his girlfriend already. He didn't think he would be so clearly rejected... She told him not to talk to her. Are they in grade school? He puts his head down, and Akane thinks he might be crying. She didn't think it could be, but... Clutching the chest of her shirt, she notes that it hurts a little. Then, she might actually...
The next day, Mio runs into Shii-chan, asking if she's on her way to volleyball practice. She tells Mio she does this afternoon, and comments that she didn't expect to see her so happy after her algebra supplemental lessons. Mio explains that she's on her way to meet Taki at the library. They go their separate ways, then Shii-chan calls back, “Mio! I'm happy for you!” A bit later, once Mio meets up with Taki, she asks him if this is really OK, just going back to how they were. Taki wonders what she means, and she tells him that she never thought she'd be the sort of person to let her eyes wander when she had a boyfriend. If she can't trust herself this time around, it proves she's a hopeless case... Taki starts laughing at the idea of Mio being a “hopeless case,” and she yells at him it's nothing to laugh about. What if she's the sort of person who will keep hurting him!? He smiles, and tells her he'll watch out. After a moment, Mio decides it will be all right, and smiles back. This time, she'll be sure not to lose sight of what's important. As they approach the train, Mio asks if they can go look for a strap after they eat. Taki asks why, and Mio says that she needs to replace the strap from her charm. Taki suggests that she just throw that one out, and Mio reacts with horror. Taki explains that he knows how hard she tried to find it, but why don't they go buy a new one? Mio is excited about that idea (though she won't be throwing the first one out). Taki figures that any time would be good to go to the aquarium, with summer break starting. Mio fantasizes about all the things they could do over summer break, now that they're back together: BBQ, the ocean, the amusement park... As she starts to share her enthusiasm with Taki, he recalls that she'll have to go to supplemental lessons every day. Her mood deflates, and she figures that she'll only have Sundays off. Taki suggests that they go on Sunday, then, and Mio agrees. An airplane catches their eye, and Mio notices the vapor trail. Taki smiles, recalling that this is where Mio saved him, back then. If she hadn't been there, he'd be dead now. Mio laughs, remembering what a shock that gave her [to see him almost step in front of the train]. Taki agrees, it was quite a surprise. His life vector shifted from facing death to suddenly facing a girl he'd hardly ever spoken to before. Amazing! Smiling, he tells her he remembers being deeply moved by that, and he'll definitely never forget.
Back at school, Marui is washing up after basketball practice, and Akane brings him a towel. He thanks her, and apologizes for all that weird stuff he said to her last night. Just forget about it... Akane interrupts, and says, “I like you.” Huh? Akane continues that, for his information, when he was concerned about it before, she really didn't like him back then. Marui tries to break in, but she keeps talking. Until he assents, she plans to continue liking him on her own. She smiles at him as she leaves, and tells him good night. As she leaves, Marui mutters that was some sort of confession from above... Akane runs into Conan as she walks back into the gym, and asks what he was doing there. He yells back at her that he's in the basketball club, too! Marui laughs at their bickering, and looks up, seeing what is presumably the same plane that Mio and Taki are looking at. A moment to remember their whole lives... The series concludes with Mio and Taki holding hands, discussing if the vapor trail means she should bring an umbrella tomorrow morning.