I think what dead dove contains differs between people. Some consider yandere dead dove now, so if you consider it so, then yandere for sunhat. Love possessive and obsessive bettel controlling Hakka’s life, done with things being left to luck. Only way to defy it is taking what he loves and locking it up, even if it hurts them.

For sunfish I like total power imbalance (both ways) & lack of transparency/ not negotiated kinks. Hakka tricking or ticking Shinri off so he’ll physically snap at him is one my favorites, something that could be healthyish IF hakka was clear that’s what he wanted, not taking advantage of Shinri’s stress .
I also like possessive Shinri, freaking Hakka the hell out. Yah it’s hot to Hakka but also scares him how Shinri looks at him across the room, sees hakka exit a room and slips “he could do better”..