?why would he kiss then punch her? This whole thing is confusing me
Suzuki is a 10 year old boy who doesnt how to fully process his burgeoning sexual feelings, he's both drawn to and repulsed by higure due to their shared status as natural outcasts. He's developing nascent feelings of attraction towards teacher, the only consistently kind and attentive adult figure in his life, and percieves her having sex with her colleague as a betrayal. After and higure witness the act he redirects his conflicting feelings of betrayal and arousal towards higure, as he sees her as a safe bet following her confession-
you wouldnt betray me, would you, higure?. He also wants to reframe their relationship within a dynamic he's more familia with, rather than something explicitly romantic, like their teacher's, so he punches her to remind her that while she's a suitable outlet for his feelings, and he, on some level appreciates and potentially reciprocates hers, she's still an "ugly creep"
