16-sai, Hajimete.

From [Chibi Manga](https://www.mangaupdates.com/groups.html?id=3006): I'll give you my first time... Haru-chan is a boy who's beautiful like a girl. To Hana, he's an important friend like a "best girlfriend" ...so she thought... Then they were locked together in the pool during a power outage. Relationship between the two has always been the same, they thought, yet... Sweet 16, It feels like something will change.