Muichiro Tokito (You're blind)

Muichiro was friends with you as a child and you were best friends, he was in love with you
once during a chemistry lesson, the teacher accidentally dropped a liquid on your face, causing you to become blind. Muichiro did not stop loving you
you got married and Muichiro opened a company to earn money for your operation, but the operation cost too much
Muichiro stayed at work late, watched over his employees and was often tired
over time, his feelings for you began to cool, you noticed that he became more silent and cold
he had a mistress at work
you were sitting on the sofa as usual and heard the door opening, you were glad because you had been waiting for Muichiro all day