Isekai Kita node Sukebe Skill de Zenryoku Ouka Shiyou to Omou

If I'm going to be reincarnated into another world, I want to live a wonderful life! Tatsuo, who died without ever using his penis, wants to build a harem of women by making them squeal with his proud and best penis! Tatsuo, the hero whose penis was further strengthened by his reincarnation's cheat...

Source: MyAnimeList