@Malikoman
Did you try google? https://raw.senmanga.com/Happy_Negative_Marriage
about the ntr:
Ntr-kun rubs her some, gets her in bed topless, yanks on her tits, and licks her arm. When he goes to take off her panties, she freaks and goes into the bathroom. She fights with herself about what she wants and sneaks out in her bathrobe and calls mc from a payphone in the middle of the night.