sister has a fun personality and enjoys teasing him.
wow i agree with other commenters his sex drive is really lacking for a teenager, the girl seems to always be the one pushing hte relationship forward

違う意味で内面を見れてなかったｗ

家ではできないって派は以外に少数派！？

樹は過去の事もあるので慎重派なのかな、危険な橋は叩いて渡らないタイプ。

こいつは性欲がないのか？