Synopsis:
Shounen ga Otona ni Natta Natsu (OVA 2024) - MyAnimeList.net
Reiko Kirishima: Ryuuki’s older sister. She is portrayed as a "Genius Slob"—unkempt and plain at home, but a mastermind in the lab.
Not what his father wanted. Not what his teachers expected. Him.
Kaito walked Aoi to her grandmother’s gate. They didn’t kiss again. They didn’t need to.
The raft was a disaster. It always was. But by 3 PM, they had a wobbly, rectangular monstrosity of rope and driftwood floating on the shallows. Yumi shrieked as Taku pushed it too hard. Ryo fell backward into the water, glasses askew, and came up laughing so hard he snorted.
She disappeared inside. The gate clicked shut.
Recommendation: If you're a fan of coming-of-age stories, character-driven drama, or just great storytelling in general, then "Shounen ga Otona ni Natta Natsu" is definitely worth checking out.