1, 3, 4, 4.5
pairing : takamizawa ei (seme - domestic cat japanese)
kagami eugene (yuujin) (uke - semi leopard half japanese british)
SHISJSJHS EUGENE IS ADORABLE
this one is the 1st series
2nd : http://www.mangago.me/read-manga/fukigen_kareshi_no_saraikata/ (2nd series)
Fukigen Kareshi no Nadamekata