MKON-059 A story about a childhood friend who had promised to marry her when she was young, but was cuckolded by her private tutor Urara Kanon

This girl is Urara Kanon. - He's my childhood friend. - Urara may have already forgotten, but when I was a c**, I made a promise to her that I would get married when I grew up. - I remember the promise I made back then, and I still want to make it come true. - Come to think of it, Urara's mother has applied for a free tutoring campaign, and a tutor will be coming to Urara's house today. - I was told that the teacher in charge was a woman, so I don't think anything strange will happen, but I feel uneasy...