All the help i can get

Sorry, following

can it be where one is super obsessive and do mind the TYPE of romance (yoai, shojo, etc.)

and sexy as in Hot ecchi scenes/ moments or they just have a lot of sex?

Bitch OF COURSE

Something like this http://www.mangago.zone/read-manga/dakaretai_otoko_ichii_ni_odosarete_imasu/
Or http://www.mangago.zone/read-manga/kare_no_shousou_to_koi_ni_tsuite/

followingg

╮(￣▽￣)╭

Obsessive

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

http://www.mangago.zone/read-manga/100_perfect_girl/ (he gets more obsessive later, try after this point if fluff doesn't intrest you http://www.mangago.zone/read-manga/100_perfect_girl/tr/40508/page/57/ )

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

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

Both

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

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

http://www.mangago.zone/read-manga/ayashi_no_ceres/ (sex stuff and obsesivness are really spread out)

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

http://www.mangago.zone/read-manga/koichirakashite/ (Many shorts)

http://www.mangago.zone/read-manga/kami_sama_x_ore_sama_x_danna_sama/ (looks like the raws may be completed)

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

Sexy stuff

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

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

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

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

http://www.mangago.zone/read-manga/hanayomesama_wa_16_sai/