Traveling Through Conan: the Cold and Cute Erguotou

The protagonist's name is Lin Ziye, codenamed Erguotou, and he is from Longguo, so his codename is Longguojiu [Funny Life Saving] There is no heroine, the system is the younger brother of the protagonist, he is studying (high school), and he does the system tasks personally. It is not a double male protagonist. It is neither corrupt nor gay. There is no CP. You can't help me if you want to criticize me. The introduction is weak. (ｉДｉ) The author's name is useless. If possible, please come up with a good name for Chapter Review (This man comes in and takes a look~)