Kouji has been dumped by four girls this year alone. He's not bad-looking, nor is his personality a problem, so what's the issue? When pressed by his mother, he reveals the reason: premature ejaculation. In order to help him solve his premature ejaculation, his mother reluctantly offers up her body for him to practice on...

Considering purchasing a copy to support the author if you enjoyed it
https://www.dlsite.com/maniax/work/=/product_id/RJ225989.html
https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_130042/

This version is from fanza, but from what I've noticed the mosaics on the DLsite versions can be slightly better.

His other work with the blonde mom one was extremely good, hope this artist gets more love

Base +9, McKatarn +6, Byakuya Kuchiki +6, hololow +6