Man... this is the good shit.
I dont even remember if i read a manga with such a good depiction of adult relationships, i dont count by a mile any story that the only focus is the MMC going in fucking sprees, this isnt relationship.
From the moments of dumb decisions to the insecurities and fears that come after to the realization that this is what makes loving someone worth, those big little challenges, and the best part is in no moment i have the impression that i am reading the thought of a bunch of overgrown adolescents that never dealt with other people.
Tateishi is a true bro, and his story is so believable and relatable, his fears and hesitation are completely credible and even justified, and his ex actions too were understandable she even waited for his answer.