A Certain Statement Turned Out to Be an Idea!

The protagonist Xiao Ran has a junior classmate who is younger than him. They lived together in high school. The junior classmate was gentle and cold when they first met. After a series of interesting things, he felt that his feelings towards the junior classmate had changed, but he did not expect that the junior classmate would strike first... Concept: Primary school students' writing style is purely enjoyable