Yuki, who feels a sense of injustice and suffering from uncontrollable envy, encounters the female doctor's "Yui" at a hospital that happened to be visited, and is confused but jealous of the invitation of "Yui." If it is an unstoppable envy, then even more emotions will pass. In the words of Yui, "Yuki" will know a new apology. even if it's a back-to-back feeling that turns into loneliness...