Slice of life

Try:
-Anohana
-ReLife
-Yahari Ore no Seishun Love Comedy wa Machigatteiru (1 & 2)
-Kokoro Connect
-Toradora
-Clannad
-Clannad: After story
-Nana
-Ao haru ride
-Orange
-Ano Natsu de Matteru
-Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e (TV)
-Hanasaku Iruha
-Kyoukai no Kanata

Some of them is focus in romance so yea, romance and slice of life.

You can check this list as well.
https://myanimelist.net/anime/genre/36/Slice_of_Life

I never seen 3 Gatsu no Lion (S1 & S2) but it has a very high rating and have a decent feedback so.. you might like it as well.

Also +1O to Sakurasou no Pet na Kanojo. Its a very good slice of life anime. You should try it first.