Recommendations?

Try Nioi and Otoko no Isshou. Also, Naono Bohra's works.
There's also Ristorante Paradiso, but the art is pretty challenging. The anime is better.
Also, Hajimari no Nina :3

Josei:
http://www.mangago.me/read-manga/game_over_mizutani_fuka/
http://www.mangago.me/read-manga/14_sai_no_koi/ (side characters not mains)

Seinen:
http://www.mangago.me/read-manga/koi_wa_misoji_wo_sugite_kara/
http://www.mangago.me/read-manga/miman_renai/ (huge gap but nothing happens)

BL:
http://www.mangago.me/read-manga/yume_musubi_koi_musubi/
http://www.mangago.me/read-manga/koi_ni_nare/
http://www.mangago.me/read-manga/koi_nanka_shitakunai/

Kore wa koi no hanashi just finished scanlation. Usagi Drop is also similar. There is an axed series called something like Kono Oneesan Fiction Desu (dont remember the name well). Tende Freeze is one too. I am not sure if Re: Marina can be called one, but its similar. If supernatural series where characters dont have appearance of their ages count, then there are tons.

Ohoho, my time to shine! (And show how creepily & cripplingly obsessed I am... yay!) ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄ Here are a few of all kinds:
Tomodachi no papa
Amber
Nee, sensei
Houkago x Ponytail
Shuuden na Kankei
Lip Smoke
My fair neighbor
Ojikoi
And (by okazaki smth)
Renái Nenrei
Renai Tsuu
Bread & Butter
& all the ones that people recommended before me, they're good ones!

Here, 4 lists I follow too:
http://www.mangago.me/home/mangalist/90565/
http://www.mangago.me/home/mangalist/45123/
http://www.mangago.me/home/mangalist/84784/
http://www.mangago.me/home/mangalist/20059/

Enjoy!~ (づ￣ ³￣)づ