Natsu no Iro no Nostalgia

After awakening from a coma, Ryouto discovers he can perceive emotions as colors—amber for joy, sapphire for sorrow, ruby for rage, and emerald for desire. Three years after leaving his hometown, he returns to Kaido-chou with his sister Miu and enrolls at Himawari Garden. The school's iconic sunflowers bloom unseasonably in May, promising good fortune. Yet his new classroom feels hollow, and he cannot sense the emotional colors of his classmates. A chance encounter reunites him with three childhood friends whose bond shattered years ago during a fateful summer. As he gathers the fragments of their broken friendship, he uncovers the intertwined darkness and love concealed within their hearts.