The female teacher Chieri was secretly in love with a student named Shinji. They had a platonic relationship, agreeing to do nothing until graduation. However, their separation came suddenly. The woman that Shinji's older brother Shino chose as his bride was Chieri. Shinji tried to press Chieri for answers, but she said nothing... Months passed, and with each passing day, Chieri lost her smile. Unable to bear seeing Chieri like this, Shinji made a certain 'decision'...
