about the same height:
http://www.mangago.me/read-manga/nights/
http://www.mangago.me/read-manga/t_x_s/
http://www.mangago.me/read-manga/elektel_delusion/
http://www.mangago.me/read-manga/kimi_wo_mukaeni/
http://www.mangago.me/read-manga/ameiro_paradox/
http://www.mangago.me/read-manga/best_ending/
http://www.mangago.me/read-manga/puchitto_hajiketa/
http://www.mangago.me/read-manga/kuroneko_kareshi_no_asobikata/ (this series)
mangas where the uke is taller or uke and seme around the same height