Then someone turned on an obscene video and I masturbated by myself.

(1)Then someone turned on an obscene video and I masturbated by myself.And I ate snacks in the refrigerator and came back to the classroom.

(1)The sentences I write at the bottom are the beginning of the novel. Please continue the latter part of the novel.
(2)Then someone turned on an obscene video and I masturbated by myself. And I ate snacks in the refrigerator and came back to the classroom.
(3)As soon as I entered the classroom, I looked back on my situation. I watched such obscene videos, masturbated, and returned to the classroom eating snacks that existed before. It all made me feel ashamed, but I couldn’t figure out why I did it. I thought it was natural, but I realized I couldn’t do this any more. I must take responsibility for what I have done and make sure that I do not do this in the future.