"It's time for today's lesson...shall we begin?" A company drinking party you don't want to attend. A senior who always harasses me. Perhaps because he has a tendency to attract strange people, he is a pervert that you will encounter with a high probability. This is my usual day. But that all started to change little by little after meeting a certain person. My neighbor, Rei Kisaragi, was kind to me and became my friend. Thanks to him, my boring everyday life has become fun. Today, I asked him about various things, such as complaining at a drinking party and encountering a pervert on the way home... He was worried about me and hugged me gently. There's no way I wouldn't fall in love with such a wonderful person. I was secretly in love with him. I developed a fear of men due to a certain incident. I never thought I would fall in love with someone of the opposite sex. This may also be thanks to the "lessons" that Rei gives us every day...! But lately...it feels like the lessons are getting more and more intense...? At this time...I didn't notice it yet. His eyes staring at me, hidden deep within them... The meaning of emotions──