Chapter 5 of Getsuyoubi no Tawawa features Onii-san feeling jealous after seeing Ai-chan with another boy on the train, but his jealousy fades when she shares a special button from her new secret cafe job. She then invites him to visit her at work, deepening their Monday morning bond.
This chapter highlights the growing intimacy between the two as she tells him she looks forward to their commute, cementing their unique connection. Chapter 5 | Getsuyoubi no Tawawa Wiki | Fandom Chapter 5 of Getsuyoubi no Tawawa features Onii-san