water_lily_'s manga / #age gap(61)

Angsty in the start, fluffy at the end. Sequel is, most probably fluffy too Has a sequel on renta https://www.ebookrenta.com/renta/sc/frm/item/138954

Kashi finds his ex cheating on him while he was planning to marry her. Izumi takes this chance to make his feelings known. Cute story. Izumi takes his time building their relationship.