Yotte, Hatsukoi wa Shoumeisareta. Delta to Gamma no Rigakubu Note

あらすじ

Upon enrolling at Tsunaga High School, Shu Ide finds himself, for some reason, tagging along with the popular girl Rio Iwama. The two of them end up at the “Couple’s Cherry Tree,” said to grant wishes for love, and notice something strange about the tree. “Let’s investigate… scientifically!” A modest record of the activities of Tsunaganoi High School’s “Science Club,” where high school students with a deep love for science tackle the many mysteries they encounter in their daily lives — including the mystery of first love.

あらすじはAniListより（英語）。