Kotowari ~Reason~ - The Soul Raised in Darkness: The Problem Arc

Story

The protagonist, Tsuina Miyo, transfers to a town of history and tourism. When he was young, a being called 'the Fanged Wild God' devoured half of his soul, giving him a special constitution that lets him interact with 'Kotowari'—monsters that nest in the darkness of the souls of people who have even the slightest connection to him. On his first day at the new school, Miyo's eyes are captivated by a female student. She is the spitting image of 'Kazamidori,' who shielded Miyo from a Kotowari and lost her life. Unable to hide his agitation, Miyo is fussed over by the very cause of his turmoil, 'Yuigahama Yuki,' who shows him around the school and town. One day, Miyo encounters a 'Kotowari' in town, with Yuki clinging to his side. Miyo is startled that Yuki can see the 'Kotowari.' His left arm, cloaked in darkness, drives off the attacking 'Kotowari.' But then another 'Kotowari' lunges at Yuki. Completely outmaneuvered, Miyo's left arm cannot reach her. At that moment, from Yuki's right hand—raised to fend off the 'Kotowari's' attack—light overflows, and a Reishin appears. A Reishin is a weapon in the shape of the hairpin that 'Kazamidori' once carried. Yuki's Reishin slices the 'Kotowari' apart. To uncover the connection between 'Kazamidori' and 'Yuigahama Yuki,' Miyo decides to visit the home of Yuki, whose family are Shinto priests. The moment he mentions 'Kazamidori's' name, Miyo is driven off the premises by the 'Great Crone' who presides over the shrine. Miyo learns from Yuki that the Reishin has been handed down in her family, and that she received it from an aunt on her relative's side when she was a child. Miyo and Yuki, drawn to each other without either taking the lead, entwine their bodies. Yuki takes Miyo's throbbing member into her mouth. Miyo kneads Yuki's greatly bouncing breasts with his left hand. The faces of the two transform, at times sorrowful, at times enraptured. Before long, the truth told by the 'Great Crone' shocks Miyo and Yuki. 'Kazamidori' was Yuki's aunt. Miyo caused that 'Kazamidori's' death by the very 'Kotowari' he generated. Yuki lives on today thanks to 'Kazamidori's' heart. The two, drawn together by a fate too cruel, now step forward into a final battle. "With this left arm that shatters monsters, I will hold you."