Reina seems to have a strong drive for sex and it looks like she had been saving herself for Shintaro and she wonts him to break up with his girlfriend Shintaro is feeling guilty about treating Reina the same as he was treated by his girlfriend before braking up officially and he feels like he not ready to make her an ex

どうせ、彼氏が手を出してくれないみたいな相談から始まってその時まで俺で練習する？になりそしてセックスの快楽にハマる…いざやると物足りなさを感じるパターン

そして自分のシテル事を棚に上げて彼氏の浮気を攻めたてる。