"Spica" is Chapter 5 of Tsurezure Children. It is centred around Satsuki Sasahara and Hideki Yukawa.
Tomorrow, Hideki is graduating. Satsuki asks Hideki to show her the stars so that she can confess to him again, although Hideki replies with a no, because she's too annoying. Although, he eventually agrees.
As Hideki sets up the telescope, Satsuki wants to set the mood to be able to confess to him. As she snuggles up next to him, Satsuki tells him that it's the last time they'll see the stars together, but she becomes loud and flustered when she tells him that they could see them if they tried, with Hideki telling her that she's noisy. Hideki asks Satsuki if she remembers the names of stars, with Satsuki reluctantly saying Spica. When Hideki asks her to point it out, she is unable to, and Hideki asks why she even joined in the first place. She replies "for love". Hideki brushes it off, not at all affected.
Satsuki asks if she really did love him, would he be happy, but Hideki doesn't answer. Satsuki starts doubting herself, taking it back and saying it was a joke again. Satsuki starts crying, but Hideki soon stops her, saying he's tired of her saying that. He then adds on that because it's their last time seeing the stars together, he wants to hear it one last time, and if she won't say it, he will.