Min Hana is a girl who has never had a partner and struggles with physical contact with others. Although she’s met kind people, she’s lived without relationships because she was afraid of touching someone… One day, while casually trying out a bath bomb she got, she accidentally ends up having intimate contact with her childhood friend, Lee Wonhoo— And for some reason, she feels that touching Wonhoo calms her. “Why is it that I feel okay when I touch Lee Wonhoo? I need to find out.” Hana, who wants to understand this new emotion she’s feeling for the first time, finds herself wanting to touch Wonhoo again. “Lee Wonhoo, do you want to try it with me?” And just like that… she proposes a very intimate experiment to him.