Kaoru is a wealthy host who throws a birthday celebration at their mansion, inviting manga artist Marina Ikeda and other guests. The character presents as an elegant young man through cross-dressing attire and mannerisms. For the birthday, Kaoru requests gifts symbolizing interpretations of love's meaning. This gathering forms the initial setting before supernatural events unfold.

During the party, a dragon shatters the festivities, transporting Kaoru and the other attendees to Camelot in sixth-century Britain. Kaoru is included among those accompanying Marina on the ensuing adventure involving elements of Arthurian legend. The character shares established friendships with Marina and the invited guests.