Iroha Narumiya was troubled by her boyfriend's affairs, despite being kind-hearted and caring. She felt weak and unmanly due to her indecisiveness, which led to frustration. One day, these feelings exploded. Her boyfriend Kohei, whom she had been arguing with, was left feeling hurt and abandoned when she stormed out. As he began to feel down, Iroha tried to cheer him up, revealing that his gentle nature stemmed from growing up without a mother figure since childhood. This knowledge mixed with her guilt over their argument, combined with her newfound maternal instinct towards Kohei, caused an emotional whirlwind within her.
