彼女の綺麗なお姉さんと二人きり… 突然のベロキス、イヤラしく舐め尽くされてセックス三昧 こんな僕って最低ですか…？

One night, Aoi suddenly appears at her sister’s house unannounced and drunk. There, she meets with her sister’s boyfriend, Yudzuru. And she immediately develops a crush on him, as she finds him particularly kind and cute. Aoi stays to sleep and sober up, and as it happens, her sister is going away to Tokio that very same day for job hunting. Which leaves Yuki and Aoi together for some alone time.