Feeling happy is actually very simple, it is the kind of real, ordinary happiness. But I also understand that this comes at a price, and it can only be savored after painful experience.
The heroine has no appearance, she is a complete novice, she has a motorcycle, and she is pretty. She has no literary talent and does not understand history. Later generations only know how to eat, drink and have fun, make flying flowers and butterflies, a modern trendy girl, and her major is military industrial design. Carry it forward in previous lives.
There are several male protagonists, all of whom are completely self-inflicted.