Hamaguchi is a fair-skinned boy with messy, light brown hair, grayish eyes and he is noticeably taller than most of his friends.
His school outfit consists of a white button-down shirt navy blue pants. He is also seen wearing a black button-down shirt with yellow buttons and black pants during the autumn/winter.
Nishikata, Takao & Kimura
Hamaguchi is a close friend of Nishikata, Takao, and Kimura. He is seen talking to them while in school and often hangs out with them outside of school, such as going on fishing trips.
- Main article: Houjou
Even though he refuses to admit it, Hamaguchi has a crush on the most popular female in the school, a girl named Houjou. In an effort to gain her favor, he tries to act more mature around her, such as drinking coffee despite greatly disliking it. He often offers to walk home with her, but later struggles to make conversation with her, which Houjou finds somewhat endearing. In the anime, he manages to ask Houjou to go to the summer festival with him, which she accepts. They are later seen enjoying the fireworks together.
- The surname Hamaguchi means "beach, seashore" (浜) (hama) and "mouth, entrance" (口) (kuchi/guchi).
|Main||Takagi • Nishikata|
|Supporting||Mano • Nakai • Sanae • Yukari • Mina • Takao • Kimura • Hamaguchi • Houjou • Tanabe-sensei|
|Minor||Sumire Takagawa • Tunnel Fisherman • Tunnel Fishergirl • Tunnel Misc • Principal • Mano's Friend • Class 4-2 Unnamed Girl|