Incest Yaoi

Because of a blood curse, the older brother craves the younger brother's sperm and the younger brother craves his blood.

Loki likes how Thor smells. That's it, lol.

Thor has a wet dream of Loki decieving him while imposter into Jane and Sif. So, he teaches him a lesson and fucks him.

He wakes up, and kid Loki is there, worried about Thor's nightmare. Thor let's kid Loki sleep with him.

Both brothers are messed up, the younger because the older deliberately messed him up. The younger is more dangerous and darkly obsessed though.

apparently, they're second cousins (that doesn't count in my books but Shuuto kept calling him Toshi-nii so I got that vibe and turns out its true).