Not sure if you consider this cute, but one of the best long ones I have read is Genwaku no Kodou. A little confusing at first, but so worth the read (I keep re-reading it)
Link..? Thank you!!
just a few...
"light-reads" but great writing, plot and execution
http://www.mangago.me/read-manga/yuki_no_shita_no_qualia/
http://www.mangago.me/read-manga/mou_ichido_nando_demo/
kimi to parade
sequel: paradise view
adorable/cute + nice pacing
http://www.mangago.me/read-manga/heart_no_kakurega/
http://www.mangago.me/read-manga/itoshi_no_nekokke/
http://www.mangago.me/read-manga/eigyou_nika/
http://www.mangago.me/read-manga/yamete_kudasai_mabushii_desu/
///i just grabbed a few from my favorites list
here's my list of longer stories: http://www.mangago.me/home/mangalist/96181/
since everyone has different ideas of cute I'd suggest you check it out and find the cute ones you like. :)
Paradise View!!!! ┗( T﹏T )┛the damn feels she man
Idk what you mean by long stories? Mangas with 20ish chapters? Or more than 30 chapters? Or really loooooong stories with over 100 chapters??
I've never read very lengthy yaoi manga so in general I will only suggest you some cute mangas:
http://www.mangago.me/read-manga/i_almost_loved_you/
http://www.mangago.me/read-manga/kodomo_x_otona_no_houteishiki/ -> super cute art :3
http://www.mangago.me/read-manga/kijima_kun/ ->super super cute uke!
http://www.mangago.me/read-manga/rutta_to_kodama/
http://www.mangago.me/read-manga/sayonara_futaribocchi_renai_shinsho/
http://www.mangago.me/read-manga/suteneko_no_karute/
prequel: http://www.mangago.me/read-manga/xxx_allergy/ -> beautiful+ super cute art
sequel: http://www.mangago.me/read-manga/secret_xxx/
http://www.mangago.me/read-manga/ame_to_kiss/
http://www.mangago.me/read-manga/tsukiatte_agete_mo_ii_n_dakara_ne/
http://www.mangago.me/read-manga/window_beyond_window/ ->korean webtoon
Everything by Umiyuki Lilly -> has also a super cute art http://www.mangago.me/r/l_search/?name=umiyuki%20lily
http://www.mangago.me/read-manga/kiss_shite_yowamushi_kun/
http://www.mangago.me/read-manga/katappashi_kara_zenbu_koi/
prequel: http://www.mangago.me/read-manga/ichiban_chikaku_de_koi_o_suru/ -> Couple No. 1 is cute
sequel of couple No.1: http://www.mangago.me/read-manga/shishi_mo_kobamazu/
Lol I just remember that there's a super long bl webtoon http://www.mangago.me/read-manga/never_understand/ The main couple is really cute but there are some dramas here and there.
Can anyone suggest for me some cute yaoi or even regular manga. I'm looking for a longer one that can make me feel happy because it's cute, of course, there can be hardships. Maybe a cute uke or seme. Thank you!