[Need help to find this sauce]

All I remember is that the MC has a friend from school who protected him from a bully. Then there's a kind of time skip; the MC is married to the daughter of a company boss. That school friend of the MC ends up marrying his bully, and then the story unfolds. The MC gets closer and sleeps with his school friend. I remember this work had a controversial ending because, besides the school friend becoming the MC's lover, the MC's girlfriend, the daughter of the company owner, ends up being drugged and forced to have sex with the bully who married the school friend. In other words, the bully, despite getting his comeuppance in the end, still slept with both of the MC's girlfriends, hence the controversial ending. Also, the MC finished the manhwa thinking his girlfriend had actually cheated on him, since he received some photos, but in reality, she was drugged; the bully literally put her to sleep and had sex with her. If anyone remembers the name.