We see more of Hara-sen, their teacher, whose own complicated feelings for Sajo act as a catalyst for Kusakabe to realize just how much he’s willing to fight for their relationship. The Intimacy of Silence:

: Unlike the lighthearted start of the series, this volume introduces significant "angst" and tension. The central conflict revolves around Rihito’s mother being hospitalized with cancer, which places immense stress on his and Hikaru’s budding relationship. The Struggle to Lean on Others

note that this arc adds a darker, more uncomfortable layer to the otherwise "sweet and sensitive" narrative. Character Dynamics Rihito Sajou

), shifts toward the complexities of vulnerability and the looming uncertainty of the future. Key Narrative Shifts in Emotional Weight