This is a story about secret love.
"Ah! Tongtong, where did these marks on your body come from?" Xiao Xiao's shout broke the tranquility of the entire dormitory.
"Oh, I slept with someone last night." Liu Tong calmly changed his clothes.
"Don't ask me who it is? Because I don't know, but it should be someone I know."
Liu Tong didn't know exactly who the "person he knew" was until six years later.