[ENGLISH-SUBTITLE] SONE-011 I lost my sense of reason due to my girlfriend's younger sister's unconscious glance at her summer clothes... Riri Nanatsumori

Her younger sister, Riri, is cuter, more innocent, and super dope than her. However, there is one thing that I have noticed since I met her...that is the summer fashion of modern girls that exposes a lot of skin. Furthermore, while relaxing at home, her p