any yaoi manga with a seke couple ?

http://www.mangago.me/read-manga/metro_dog/
http://www.mangago.me/read-manga/hatsukoi_no_atosaki/
http://www.mangago.me/read-manga/haru_wo_daite_ita/
http://www.mangago.me/read-manga/three_wolves_mountain/
http://www.mangago.me/read-manga/kaikan_fortune/
http://www.mangago.me/read-manga/mazu_wa_ubaiai/ ongoing
http://www.mangago.me/read-manga/hai_to_diamond/
http://www.mangago.me/read-manga/sojou_no_koi_wa_nido_haneru/
http://www.mangago.me/read-manga/neji_no_kaiten/
http://www.mangago.me/read-manga/dakishimetakunai/
http://www.mangago.me/read-manga/innai_kansen/
http://www.mangago.me/read-manga/yononaka_wa_bokura_ni_amai/
http://www.mangago.me/read-manga/ai_no_kotodama/
http://www.mangago.me/read-manga/yume_no_kodomo/
http://www.mangago.me/read-manga/michiru_heya/
http://www.mangago.me/read-manga/omoisugoshi_mo_koi_no_uchi/
http://www.mangago.me/read-manga/finger_stinger/ chapter 2+3
http://www.mangago.me/read-manga/fascinating_summer_vacation/ ongoing

thanks I'm gonna give them all a try. xD