Blue is the coulor of sadness

Karamatsu is the second oldest of the Matsu brothers, despite that, the younger brothers ignore him and make fun of him, in addition to the only older one never doing anything and even helping the brothers make fun of him.
Karamatsu always endured the "games" with a smile, which was her mask, and her sunglasses, which hid her tears.
But everyone has their limits, and Karsamatsu's one day breaks, making him the exact opposite of his personality.

WARNING: contains self-harm, insinuations of suicide, cursing and physical and verbal aggression.