
Not sure why it's s urgent but here: nerd semes
http://www.mangago.zone/read-manga/kouun_no_rihatsushi/
http://www.mangago.zone/read-manga/kyou_mo_ashita_mo_asatte_mo/

Also here:
http://www.mangago.zone/tag/small+seme/

My eyes are playin tricks on me, I could swear your original post was for nerd semes or tiny semes but now it reads ukes....so try tgese lists:
http://www.mangago.zone/home/mangalist/343942/
http://www.mangago.zone/tag/Small+uke/
So I really really need a yaoi or shounen ai where the uke is a nerd and weak or a uke that is super short and tiny and weak **