Chapters 1-2: left by lover, when heat came lied and take advantage of the one who helped him until realized true feelings.
Chapters 3-7: the douchebag bf of omega from previous chapter who was two-timing with a beta gf.. He's always underdog at work and at home since his brother was an alpha but the omega he's with currently was way too kind even if the douchebag partner was violent with him(during breakup with gf for another alpha) in the end he was still with kind omega partner.
Joukakei Kareshi