Iori's boyfriend is sweet and very handsome, but the sex just isn't that good. That's why she has trouble maintaining romantic relationships. It's not like she's frigid or physically insensitive, either. After all, she has plenty of fun with her own vibrator. In fact sex toys are much more thrilling and way more pleasurable than sex with her boyfriend. That means Iori is spending her days troubled by a lack of good, intimate and pleasurable sex. Cue: Her socially inept and hard-to-read little brother Aoi comes to her looking for some advice. "I can't seem to get my girlfriend off during sex." "What should I do to please a girl?" Here she thought this was going to be a normal brother-sister talk and out comes a totally unexpected romantic topic from her little brother. Thinking to play the role of big sis for once, she casually starts giving him advice but...

There is a TL and R18 version.

Vol 1: English (DLsite, Coolmic), S.Chinese, T.Chinese, Korean

Vol 2: English (DLsite, Coolmic), S.Chinese, T.Chinese, Korean

Vol 3: English (DLsite, Coolmic), S.Chinese, T.Chinese, Korean