Meisa, who used to be a teacher, is a newlywed wife living in an apartment complex three months ago. Her husband is often away on business trips. Mita, a former student of hers, visits her to study for an exam, but while massaging Meisa's cramped leg, he becomes aroused and attacks her. Meisa resists but accepts Mita's feelings. One day, she finds her neighbor Sagawa collapsed in front of her room and goes to look for him, and she begins to worry about him.