Makoto Sakaguchi, a fifth-grade elementary student at Minami Elementary School, belongs to a tight-knit trio alongside Yūnosuke Ogasawara and Ken Takayanagi. Though raised in wealth as the heir to a family-owned hotel, he eschews any air of entitlement, maintaining an unassuming presence. His demeanor is marked by a perpetual drowsiness, and while once academically gifted until third grade, his subsequent shift remains unexplained.

Initially oblivious to classmate Tomomi Takahashi’s crush, Makoto slowly discerns her feelings, culminating in a pivotal date at his family’s hotel that deepens their bond. Their interactions gradually intensify, though the extent of their future relationship remains undefined.

Makoto’s household includes an older sister whose starkly contrasting appearance hints at unexplored dynamics. Within his friend group, he navigates social exchanges with a relaxed, occasionally detached manner, yet reveals moments of quiet consideration—particularly in his evolving connection with Tomomi. His family’s hotel serves as both a backdrop to key moments and a subtle reminder of his privileged yet unpretentious upbringing.