Mayuki is an extremely beautiful teacher who cares for others, so she is loved by many people, including Yuki. This time, while preparing for the school festival, Yuki accidentally got wet. Worried that the student might catch a cold, Mayuki took him home to bathe and change clothes. Today is also the day her boyfriend comes to see her after three months apart. But because the subway stopped running, he gave up, leaving Mayuki feeling lonely and disappointed. With no subway running, Yuki will also stay overnight here. Seeing the lonely teacher drinking alone, Yuki couldn't resist her perfect body and decided to cross the line! Although she initially refused, Yuki's large penis and abundant stamina quickly conquered Mayuki. She disregarded her teacher status, ignored her indifferent boyfriend, and indulged in sexual pleasure with her student...