University student Hsu-hao longs for love. He subscribes to the “fish pond theory”, believing that he should spend time with and compare many different girls before choosing the right one. One night, Hsu-hao comes across a girl named “Koi” on a dating app and they hit it off, but the app does not match them. As he begins searching for her, a classmate recommends that he use the “Rent a Girlfriend” service. Hsu-hao ends up having a great Valentine’s Day with a girl from the service, and despite still wanting to kind Koi, he becomes inexplicably attracted to this new girl…
Po-Ching is an OCD patient with serious symptoms of mysophobia. His “quirkiness” has also isolated him from the general public and people see him as a completely weirdo. Po-Ching goes out for grocery shopping on the 15th of each month. Someday, he meets another weirdo Chen Ching.
An introverted bookstore owner communicates with his customers through letters, sending waves of care and comfort. Three young girls, each confronted by difficulties at different stages of their lives, visit this bookstore and start their own new journeys afterwards.