Gekkou no Rankan ni Kuchinashi no Nioi

From Peccatore-Sanctuary: Saikawa is a teacher at a fine-arts prep school. His colleague, Nashimoto, is a great guy and always stays by his side for him. Looking at Saikawa so depressed after holding his wedding yet breaking up even before submitting the marriage registration, Nasimoto instinctively gives him a kiss. Nashimoto who realized his feelings for Saikawa...!? Included Oneshot "And the Rose Coloured Days"