https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_256730/

>Meiharu Sakurawei was taken in by the Kirihara family during her parents' overseas assignment.
>She quickly becomes friends with Kirihara Akito, who is the same age as her, and despite growing up in a complicated family, she is drawn to the kind and pure Akito, and confesses her feelings to him at the graduation ceremony, and the two become lovers.
>Surrounded by her generous boyfriend and cheerful friends, Meiharu spends a happy time in her childhood, however, on a night when her boyfriend Akito is away from home due to bad weather, her half-brother Fuyuki, who is secretly in love with Akito, forces her to do it....

Base +8