Bisexuel

yes please

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

http://www.mangago.me/read-manga/fake/ (keep in mind it's a 90s yaoi if you don't like the art that much lmao. the seme's bisexual ^^)

You meant like bisexual characters?

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

http://www.mangago.me/read-manga/an_innocent_sin/?1j6B (I think ML is bisexual due to having a relationship with a guy before. This is both straight and gay manga as far as I can remember.)

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

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