Can someone recommend a yaoi manga with a gentle nice guy seme that shows his possessive d...

Would this count?

Punch Up

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

Honto Yajuu

Yume Musubi Koi Musubi

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

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

http://www.mangago.zone/read-manga/nise_x_koi_boyfriend/
last story ch.5
http://www.mangago.zone/read-manga/gosan_no_heart/
http://www.mangago.zone/read-manga/ouji_no_hakoniwa/
http://www.mangago.zone/read-manga/otona_keikenchi/
http://www.mangago.zone/read-manga/color_recipe/
http://www.mangago.zone/read-manga/darenimo_iwanaide/
Some of these are really dark I didn't know how possessive you wanted it ╮(￣▽￣)╭