Tsutomu Tachibana is the protagonist’s close friend, known for his flirtatious charm and clumsiness, which frequently land him in lighthearted mishaps. His playful interactions with women often spark comedic misunderstandings, such as an incident during a school festival where he was caught in a compromising yet innocent scenario with a female classmate, fueling rumors among peers. This classmate, a childhood acquaintance, shares a rapport with him that occasionally leads to joint efforts, like distributing event flyers or coordinating school activities, blending their chaotic energy into unexpected teamwork.