Sakuramiya Shimai no Netorare Kiroku

Sakuramiya Saya and Hinata became sisters after their parents remarried, after which they had a relationship and became a couple. Tachikawa, of the photography club, discovered about their relationship and blackmailed them. It starts with the youngest, Hinata. He makes a video of her losing her virginity while he forces her to have sex with him. Concerned about Hinata, Saya goes to the club and they end up being raped.