Never should be exposed, just the two of them in their youth. 「I’ll be making your meals from now on, Sensei.」 I, Reiyu Tenjo, am a high school teacher. When I shared some food with my neighbor, it turned out to be my student, Yuunagi Nishiki. If this fact is discovered, I might be fired from the school? That’s why we signed a 『Neighbor Agreement』 in order to keep our secret. Since we both live alone, the plan was to help each other out when one of us was in trouble——but somehow, I got won over by his cooking. Instead of helping him, I find myself increasingly spoiled and dependent that I can’t live without him anymore. ‘No, Reiyu Tenjō is your student, someone you are not supposed to fall in love with!’ Drawing closer and then apart——their love sways ambiguously like waves. A youth romantic comedy filled with secrets between a teacher and student begins here.