The Man I'm Probably Going To Marry (2017)

Kekkon Suru Kamo Shirenai Otoko

Ryosuke Ogitsu will soon be turning 30, so he decides it's time he finds a man to settle down with and attends a speed dating event hosted by his friend Kirito. He's looking for a partner who's only interested in men. He meets Shun Kariya, a man with beautiful eyes who gazes earnestly at Ryosuke from behind his long bangs... Their relationship starts off a little slow and awkward, but they gradually close the distance between themselves. Ryosuke starts feeling like Shun might be the one, not realizing that Shun's got a big secret...!
This is a sensitive love story between two lonely men looking for their one and only.

(Source: Renta!)