any gender bender uke yaoi that the seme thought hes a girl and fell inlove to her* this h...

well these have where the seme thought the uke had been a girl, but they don't work together or anything:
http://www.mangago.zone/read-manga/umi_no_juunin_to_wa_koi_wa_shinai/
http://www.mangago.zone/read-manga/tonari_ni_kimi_no_nukumori_wo/mf/v01/c004/
sorry only one i can think of that are similar.

Love stage?

Here some i think a little same with ur description :
http://www.mangago.zone/read-manga/udagawachou_de_mattete_yo/

http://www.mangago.zone/read-manga/kawaisa_amatte_nanika_ga_hyakubai/tr/108563/page/106/

http://www.mangago.zone/read-manga/goshujinsama_ni_kiwotsukete/