Japan is so sensitive to smell that there is a term called "smelly harassment. Mai, a college student delirious helper with an armpit cancer complex, is strongly criticized by a customer today because of the smell of her own armpits.

Meanwhile, the gap in romantic experience is widening among Japanese youths, and those men and women who are called "romantically weak" often have a complex about their own romantic experiences. Makoto, a male university student, is one of them. He was rejected by Mai's friend Erena because of his virginity, and his own complex makes him feel inferior.

One day, Makoto calls Mai at a delicatessen in order to graduate. Mai tries to hide her armpit cancer, but Makoto finds out. However, Makoto gently kisses Mai's armpit. Mai, who has accepted her complex, is attracted to Makoto. ......

However, Makoto still seems to like Erena. Mai is depressed to learn this fact. Meanwhile, Makoto tells Erena that he has lost his virginity, but she brushes him off, saying, "That's not what I meant. Makoto is depressed. Makoto is depressed, but then he notices Mai's feelings and kindness.

スメルハラスメントという言葉があるほど、臭いに敏感な日本。ワキガにコンプレックスを持つ女子大生のデリヘル嬢·まいは、今日も自身の脇のにおいが原因で客に強く当たられる。

一方、日本の若者の間では、恋愛経験の格差も広がり、恋愛弱者と呼ばれる男女は、自分の恋愛経験にコンプレックスを持っていることが多い。男子大学生·誠もその一人で、まいの友達·絵梨奈に童貞が理由でフラれ、自身のコンプレックスにより劣等感を抱く。

ある日、誠が卒業するためにデリヘルでまいを呼ぶ。まいはワキガを隠そうとするが、誠にバレてしまう。しかし、誠はまいの腋にそっとキスをする。自分のコンプレックスを受け入れられたまいは、誠に惹かれていく……。

だが、誠は相変わらず絵梨奈のことが好きらしい。その事実を知りまいは落ち込む。一方で誠は童貞を卒業したことを絵梨奈に伝えるが、「そういうことじゃない」と絵梨奈に一蹴される。落ち込んでいる誠。その時にまいの気持ちや優しさ気づいていく。