Eiko (29) has always avoided romance because she felt like a negative person and focused all her attention on her hobbies instead. Until she met the king of the positivity Koigakubo (23), who is handsome, communicative, good at his job, and surrounded by a sparkling aura. Eiko wanted to stay as far away from him as possible, but one thing led to another and he ended up volunteering to teach her about love...! An adult first-time romantic comedy about a woman in her late 20s who is not good at love and a sparkling younger man who can't stop flustering her heart!