The Bunny Girl Senpai Won't Dream of an Efficiency Detective

If characters from various anime came to the world of Rascal Does Not Dream of Bunny Girl Senpai, how many would develop Adolescence Syndrome?

When Houtarou Oreki meets Sakuta Azusagawa, how will they use their exceptional intelligence and emotional insight to help others untangle their inner struggles? And in the end, how will each of them resolve their own problems?

All in all, this is a story about making up for regrets.