Following his recent bike trip, Makoto is hospitalized with a broken arm. While in hospital, he is visited by Ryūko and Maekawa who are surprised to hear that he's living with Erio. After two weeks, Makoto is discharged from hospital and returns home, where he finally sees Erio again, who gives her thanks for bringing her back to reality.

Maekawa is confused by an anonymous person leaving soft drinks outside of the sweets store she works at, suspecting someone who launches bottle rockets nearby. She later meets with the culprit, who claims to be a fan of hers and commissions her to make more bottle rockets. She accepts the job, asking Makoto, Erio and Ryūko to help out. After they each make some rice bowls for dinner, Erio invites Maekawa and Ryuko to stay for the night, where Ryuko mentions to Makoto about it being her birthday the next day and how she'd take his side if it came down to people picking on Erio. The next day, they go to the beach where they join the bottle rocketeer in launching their bottle rockets.

Makoto and Erio continued to be bothered by the spacegirl, who later introduces herself as Yashiro Hoshimiya. Later that night, Ryuko calls Makoto about her upcoming basketball game, asking him to accompany her to the festival if she is able to play in it. The next day, Meme has Makoto take Yashiro back to her place, stopping by a pool along the way.