Rui and Tsukasa had been enemies for years. They both hated eachothers guts, especially since Rui cursed Tsukasas sister, Saki. The reason why he cursed her was because he hates the king, which is Tsukasas father. Anyways, recently, Rui is trying to warm up to Tsukasa since he has deeply fallen in love with him, head over heels. But the knight still despises him and doesnt seem to want to forgive him any time soon.