It would be nice if you could look after the person called senior properly.

Takiguchi Yoi is a girl who is called "Prince" for her neat appearance and smart manners.
At school, she meets Ichimura, a senior who is also called "prince", and they start dating on a trial basis due to a trivial reason.
Yoido, who was initially wary, gradually opens up, and at the summer festival, they finally confess their feelings to each other and begin a formal relationship.
During a trip to Kobe with her friends, her bond with her senior deepens, and as they successfully overcome subsequent arguments, their feelings for each other grow even stronger. Then, at the cultural festival, her senior finally publicly declares their relationship! What will happen to these two as they move forward?
The love between a man and a woman who are both called "princes" deepens even more... ?!!