Synopsis

Hina has no romance experience, but has 4 biases at the university:

A cute little devil Ritsu, who younger than her;

Souma, a guy with good visuals from the same year;

Eccentric, 4th dimensional You;

and Nagisa, who’s close friend is playing around with pretty girls.
Hina was so excited to celebrate her 20th birthday surrounded by her 4 biases that she unintentionally drank too much. She doesn’t remember much, but one thing is for sure… she kissed someone! The suspects are her 4 biases. Who did she kiss? Feelings of touching someone’s hand, obstructed visibility, the scent of perfume, a sweet taste, and a whispering voice… She must track down the person she kissed engaging all five senses!