1095-nichi no Hanataba

Kosei is your typical office worker except he's gay. He meets Haruka at a gay bar despite Haruka not being gay himself. On a whim, they end up going home together and start dating! Fast forward three years, and they're living together. The honeymoon phase is long over and Haruka's lack of romantic gestures has really started to get on Kosei's nerves.

"But today was our anniversary..."

When Haruka fails to live up to Kosei's expectations yet again, he has had enough and wants to break up! Seemingly apathetic, Haruka agrees. Despite his frustrations, Kosei loves the small things Haruka does for him, but the small misunderstandings between them have left Kosei feeling broken. A bittersweet love filled with heartbreak as these two try to understand each other. This bittersweet romance explores the heartbreak and challenges of two people in love trying to truly understand each other.

(Source: MangaPlaza)