Due to his parents' work, the protagonist Keino Haruki, lived with his family overseas, but when his older sister Keino Chizuru, forced him to dress in girls' clothes made by her and uploaded them on social media, he received an unexpected reaction. At that time, Chizuru's career as a world-renowned fashion designer began, while Haruki is viewed as his sister's exclusive model, and continued cross-dressing in order to help with his household income. However, his sister could not adjust to living overseas, so she decided to return to Japan with him. Two weeks after he returns to Japan, a girl, who at first glance, looks like an ojousama from a respectable family, comes to his house. "C, Could it be, you are..." "Hotaru......! You're Hotaru, right? It's me, don't you remember......!?" Haruki looks at the excited girl's face, memories of his childhood suddenly come to his mind. No matter how many years have passed, they never fade, he remembers her face instantly. The face of the girl who has captivated his heart. The face of the girl he loves―― But there is also one thing he remembers. At the time when he met her, he was dressing up like a girl for his sister as well. When he takes the girl to his room to explain the situation, she finds a picture of a boy. "What's the meaning of this!? This boy!" Haruki thinks his cross-dressing is exposed. "By any chance, is this the boy you like!?" "Because you like the boy in this picture...... You cannot go out with me?" "I will never lose to a boy like this! I'm going to marry Hotaru!" The girl makes the situation more confusing. Little does she know that the girl before her and the boy are one and the same. In this complicated love triangle, will Haruki able to make his love come true?