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A high school girl, Sayaka Kudō was the bottom of the class. After a year, she improved her deviation value from 30 to 70, then passed Keio University that is considered one of the most difficult to enter in Japan.
A young couple got married almost immediately after meeting each other through a dating app and did not realised that they were working for the same company. They decided to keep their marriage a secret from their company and friends. At first, both parties thought it's okay to get married without love but they gradually got attracted to each other.
Yuna has a crush on Haru. She sees him on the train every morning when she goes to school. She doesn't know anything about him and he goes to a different school from her. One morning, she wakes up and finds Haru sleeping right next to her.