In this OVA, Yuki is the one who forgot everything after his parents were murdered, and Seto is the one searching for Yuki!
In an apartment somewhere...
Sakutaro: Ohayo, Yuki...
Yuki: Ohayo, Sakkun~!
My name is Yuki Amanogawa. I'm a normal classed demon. I'm not from a clan, but I don't care' I'm enjoying life as a less than important demon.