i have a boyfriend, but once a month i make a mistake. that day, my ex-boyfriend who moved away for work comes for a business trip. we wont be together again. but i still cant forget him. he says "even after breaking up, himari is number one. himari is special." after work, i meet my ex-boyfriend. until he takes the last train home, we have three hours. we fucked over and over, cherishing every moment.