SPOILERS ！
Mikko want to stay with me but i reject him and go back to my room. And Mikko was hurt so bad that he left the house at night .I went out to find him and entered the forest then i fell into water.
I just paly the Mikko route again quickly to trigger the scene,and i think it maybe the punishment for hurting Mikko (i hurt Mikko ,i'm a bad person 🥺 )