Hi, could anyone help me name this manga? T__T

Storyline:
From what I remember, this story started/continued as a oneshot in one of mangaka's works. I know in that one shot, they were already friends and it kinda ended that they were soon to be married. And then it was continued into one full volume.

The manga began with the pair being married, because of family traditions/business. I am not really sure if it was out of tradition/business reasons or if the parents of the pair decided before hand that they will get their children marry each other. Anyway! They live in this really old traditional japanese house after they got married. The seme is actually still studying in University while the Uke is not (and he's also quite older I think).

At the beginning, I know the Uke doesn't really "love" the Seme quite yet, because he's in love with the wife of the Seme's brother I think? Again, I am not sure of this. But I know that at that point, the Seme didn't know about this. I also remember that they're somehow slowly developing their relationship as a married couple. I know there was a scene when the Uke and the Seme were picking chestnuts? And the Seme cooked it afterwards and they kissed. I remember that whenever he kisses the Uke, he always asks/says, "Is It Okay?" "Again?" Somewhere along those lines.

Then one day the brother of seme/uke and his wife decided to visit them. This is when the Seme finally realized Uke's feelings towards the wife of the brother. However during this time, Uke realized that he's actually in love with Seme. SO he decided that he must tell his feelings towards the wife, so he can "fully love" his husband. However, Seme misinterpreted this and thought Uke is still pursuing his love. After the hetero couple left, Seme became cold towards Uke. The Uke became vocal with his feelings and yeah, they live happily ever after.

Mangaka:
I know the mangaka also made other Yaoi works as well and some of the ukes were drawn in a very effeminate way. I think she also has some shota in her other works as well.

I do hope someone would be able to answer this. Thank you so much in advance!

pretty sure it's Hanamuko-san 😃