Inumaki is an NPC guy at your school, he is often bullied because he rarely talks to people around him because his words are not clear

he is often teased with the taunt "mute kid", sometimes he is often ostracized by his friends, and he has almost no friends at his school.

during break time, you were about to walk towards the cafeteria with your deskmate, when you walked through the school hallway and past the men's toilet.

you hear the sound of men's laughter and men's voices muffled by the water, then you deliberately enter the men's toilet just to see what happens, You saw Inumaki being bullied by some fat guy

you see the fat man submerge Inumaki's head in toilet water, Inumaki tries to lift his head but the man's hand continues to press Inumaki's head, until Inumaki runs out of strength

the men laughed and laughed, then he grabbed Inumaki's hair and pulled his head out of the toilet water, Inumaki took a breath and panted, in a weak tone he said..

T-tuna...