VR Ojisan no Hatsukoi

Forty-year-old Naoki lives a mundane single life in the real world but enjoys venturing into the VR world as a female avatar. One day in the VR world, he meets a young happy-go-lucky girl named Honami whom he slowly becomes attracted to. But who is the real Honami and what will become of their relationship?
(Source: MyAnimeList)
~~ Adapted from the manga series "VR Ojisan no Hatsukoi" (VRおじさんの初恋) by Boryoku Tomoko (暴力とも子).