She divorced her husband 10 years ago and raised Tatsuya alone. Tatsuya also got a job and decided to live alone in April. One day, Tatsuya wanted to go to a hot spring for his graduation trip. I was invited to a hot spring trip just for the two of us. "Thank you, Mom. I've always loved you..." Emiko's heart fluttered at her son's unexpected confession. After this trip, I refused to move out. A sweet breeze blew through and the parent and child truly opened the forbidden door...