Ijimeru Aitsu Ga Warui no ka, Ijimerareta Boku ga Warui no ka?

Aizawa was relieved that after twenty years, Suzuki hadn't changed. The two met again at their school reunion, and his former bully Suzuki was as spiteful as ever. But little did he know, Aizawa was now a middle school teacher. And his beloved daughter is one of his students…

(Source: MANGA UP!)