Hi, im trying to find this manhwa. The uke found out that his boyfriend is cheating on him...

Hi, im trying to find this manhwa. The uke found out that his boyfriend is cheating on him with their office mate, idk what happened next but he came back in the past and now he's trying to avoid the seme, they're office mates btw. the seme is blonde, while uke is black haired (not sure tho.) plssss help me find it