i watched this a very long time ago so the details are fuzzy but i do like the thought of extremely good bodyguard/servant ivan who's a little too handsome and well-qualified for a job like this (also demon dogboy) and till who's like a sheltered (literally) young master who grumbles and snaps at everyone in the house but they all like him since he's so cutieful... and also that side plot of the tragic time loop reincarnation thing WOWZA i think ivan should die for till and then get reincarnated with all his memories ready to do it again and till to eventually remember and be horrified at how self sacrificial ivan is for till

(happy ending because till convinces ivan that life would be happier if he lives for the both of them and therefore ivan just goes from "i'll die for till" to "i'll be happy and live a long life with till since that's what till wants" and therefore all their enemies are Instantly Vanquished)

thanks for the ask!