I am a mouse, a mouse that has always been loved and hurt. In order to fulfill the love of others, he sacrificed himself, looked at the smiling face of passerby, and walked away in tears. So the mouse turned into a man, wandering the streets every day, hoping to find true love, but afraid of being hurt.
A ruthless mouse fell in love with a cat uncontrollably. They are natural enemies and live in two completely different worlds, which destined the Rat's love to be sad.