"The kind of guy super gorgeous girls seem to be looking for- it makes me cry."
On holidays, he puts on a fashionable exterior— his true self.
On weekdays, he looks plain and unremarkable— his public facade.
One Sunday, Haruya Akasaki, a high school boy with a dual personality, comes to the rescue of a beautiful girl who is being harassed by a man.
But from that day onwards, he finds himself helping troubled girls every Sunday, resulting in him becoming the topic of conversation among the S-class beauties in his class.
"... Hmm? Where have I heard that story before?"
This is a story about Haruya, who unwittingly helped the S-class beauties and gained their admiration, eventually leading to the creation of his own harem.