Hamaoka Senpai (the photographer) will generate tension and act as a catalyst for the plot, pushing Kanon to question the nature of her emotions and causing Saki to act with greater caution or unease. While I don’t believe Senpai has malicious intentions, she will undoubtedly create a disruptive atmosphere for both Saki and Kanon, who, for different reasons, maintain reserved and discreet persons.
On the other hand, the role of being models inherently involves themes of exposure and self-display. Combined with the second appearance of the title "Amayo no tsuki", this will likely bring hidden emotions to the surface.
It has been repeatedly emphasized that Marioka (Iwate Prefecture) is a small town where running into acquaintances is common. This is highlighted in Chapter 1, when one of Tomita’s friends (during a conversation with Saki) mentioned knowing a classmate from her cram school. This classmate, who attended secondary school with Kanon, revealed that Kanon was bullied. A similar dynamic is seen with Saki, who frequently crosses paths with Ayano.
This makes Saki’s role in the story particularly intriguing. At this point, she remains an "Mysterious". Even when the narrative adopts her perspective, it reveals little about her. She appears to have no friendships from her past or previous school, painting her as profoundly solitary. We also know little about her family dynamics, aside from her having grown up in isolation and, as repeatedly noted, without a father or male figure in the household.
It is hinted that a classmate (whom Saki observed and seemed drawn to) discovered her sexual orientation. This raises the possibility that someone exposed her, leading to her ostracism & isolation. Uncovering the root of Saki’s fears is undoubtedly one of the story’s most compelling unresolved threads. How will Kanon discover this? And how will she react?
Meanwhile, Kanon already harbors feelings for Saki that go beyond respect and affection. Learning about Saki’s suffering and repressed struggles will undoubtedly pain her. During a conversation when Ayano and Kanon reunited, Ayano advised her: “If she ever finds herself in a tough spot, make sure you can be there to help her.” This foreshadows that Saki will inevitably confront her past, and Kanon, too, will eventually have to face the hidden parts of Saki she has yet to understand.
Symbolically, the art of photography (capturing moments, expressing concepts, and conveying lived experiences through images) aligns perfectly with the current narrative arc. Here, there are secrets to unveil and buried emotions that demand to be voiced.