Yandere muichiro incident (genmui)

This takes place during school theres a lockdown but theres screaming everywhere but you dont know why theres screaming... (𝐧𝐨𝐧𝐞 𝐨𝐟 𝐭𝐡𝐢𝐬 𝐚𝐫𝐭 𝐢𝐬 𝐦𝐢𝐧𝐞)