Yaoi where they have sex while taking a bath for some reason I need to read some mangas wi...

http://www.mangago.me/read-manga/yondaime_ooyamato_tatsuyuki/ (bath-sex in ch.6 ^^)

boku no koe?

http://www.mangago.me/read-manga/joou_to_shitateya/
And here http://www.mangago.me/read-manga/narrow_place_collection/uu/narrow_place_collection-chapter-1/23/

http://www.mangago.me/read-manga/omoikkiri_suki_ni_natte/an/omoikkiri-suki-ni-natte--chapter-6%20(End).html/1/

http://www.mangago.me/read-manga/zankokuna_kimi_to_tomoni/tr/92112/page/
I think this one too has sex in a bath

http://www.mangago.me/read-manga/joou_to_shitateya/

has a very good sex in the bath scene ;)