I know it was gonna be incest as soon as i see the name of Mochi. Not a huge fan of the sadist/clumsy pairing because of how the clumsy always look like a fool who can't achieve nothing.
Yeah I like that dynamic a lot more when the clumsy one has something that they are actually really good at. And not in a, "really good at the thing but sadist is still better/they mess up around sadist" way. Full stop very good at the thing, sadist has to pick other areas when messing with them.