Can a girl suffering from obsessive-compulsive disorder truly hold the hand of the person she loves? Kim Yeo-ul, a girl with obsessive-compulsive disorder due to childhood trauma. She's pretty and smart, but she avoids physical contact with others to an extreme degree, never even holding hands with anyone. After becoming a high school student, she intentionally tries to erase her presence to avoid being noticed, but a moment of carelessness leads to Jin Hae-soo discovering her condition. In contrast to Kim Yeo-ul, Jin Hae-soo is cheerful and full of curiosity. Although she is often described as unique, her lively and considerate nature makes her popular with both boys and girls. As she observes Kim Yeo-ul out of curiosity, their relationship gradually deepens when she saves her from danger. And then… At some point, the two start to feel a strange, thrilling emotion towards each other and become flustered. "Hae-soo, have you ever… kissed someone?" The two navigate the delicate line between love and friendship. Will Kim Yeo-ul, who rejects contact with others, succeed in having physical intimacy with Jin Hae-soo? ...?