Responses
He was in love with the step-brother, who was in love with his sister, so Tsubaki got jealous and attempted to hurt the sister out of jealousy and unjustified hate for her because his step-brother (who wasn't gay and whom Tsubaki later tried to borderline rape) was in love with her instead of him by trying to destroy her life when she had nothing to do with anything and was innocent in the whole affair.
Do we read the same manga or nah? You seriously want a justice for Tsubaki. What for??? Cause he got his heart broken? Lol.