* Male protagonist: Calix Winter.
A northern grand duke of southern origin with bronzed skin.
Because of his complex, he has never shown his bare breasts to others, and thanks to that, he is still a virgin.
He is obsessed with chest exercises because he thinks that if he grows his chest muscles, his indented nipples will come out, but he has only become big breasts.

*Female protagonist: Emilia.
Northern-born with fair skin.
She is the new maid at Winter Castle. She has a lot of motivation. She is always ahead of the action, but she only makes accidents.
As befits a native of the rugged northern country, her stamina is better than her looks.

*Watch it at this time: When you want to see the sexual and comical story of overcoming the sexual and comical complex of a male lead who keeps the secret behind perfect big breasts and an erratic and reckless female lead.