Uke works as teacher for small kids and seme is his student's uncle but the uke also has a...

Uke works as teacher for small kids and seme is his student's uncle but the uke also has a twin brother whose lover is the seme's brother

So uke x seme
And uke's twin bro x seme's bro

I forgot the name ...it would be a big help if you could help me find it