I'm so tired of looking through my 400gb manga files for this title, ugh. So, pleas help me guys~~~~

Anyway, it goes something like this:

There's this man (call him [A]), whose wife is either dead or divorced. Most likely dead. They had a son, and I think during the course of the story, the son is already a teen. Anyway, I'm pretty sure someone is courting the [A]. It's either another man or the son, I dunno, ugh. The most significant part of the story for me is that the son "ran" or left his grandmother's home. This grandmother is the mother of the wife, I think. By the time the son is deciding whether he should stay with his father or with his grandma, I think everything is going well with the [A]'s lovelife. Anyway, the son went to live with grandmother, and there's a scene in the garden. I hope it's clear, even though I think otherwise.

Yes, that's right! Thank you so much~!