Not too serious

Despite being in a relationship for a while, Narumi and Hiro haven't taken a significant step forward. Hiro wants to move things to the next level, but Narumi keeps pushing him away and causing him pain. As if that's not enough, a new colleague joins the office, eager to capture Hiro's attention. Narumi can't help but feel a twinge of pain in her heart, realizing that her feelings for Hiro may not be as serious as she thought. She watches as he talks to the new colleague, feeling a sense of unease and jealousy. Despite her confusion, she can't bring herself to let him go.