Lion, a lesbian student, falls in love with Yuri, an office lady whom she occasionally sees on the train. One day, Lion sees Yuri sleeping and secretly kisses him. Yuri notices her kisses several times and feels strange...but she doesn't interfere any further and ends up having a strange relationship where she only kisses when they meet on the train. Once they know each other's identity, they escape from the train and develop into lesbian behavior. A lesbian story that connects the lips of two people who love kissing.
