THE RED STRING OF FATE

Keiji has the special ability to see red strings of fate...threads that connect when two people are meant to spend the rest of their lives together. One day, he looks down at his hand and sees that his string has finally connected to someone!! But when Keiji finds the person on the other end, he realizes it's... a guy!!! (Source: Renta!) — Description from AniList community (anilist.co).