>>532277353
Heavily tied into main story:
-Bishokuden
-Altar Maiden
-Every Prifes characters except the superforma of non main story characters (Littlelyrical, akisaren,anngrea)
-Every seven crowns
-Dragon's Nest
-Every arc 3 new characters, preferably on release order (including the prifes ones) so you can see the development between MC and Tia
-after all in above, then you can easily read Twinkle Wish ones (Their bond explore about the relationship between MC and the girls more rather diving into the world building)

Personal favorites other than i mentioned:
-Nkds bu (easily, since i love their writer's works)
-Shinobu (because her dad is funny)
-Carmina except Chika
-Akino
-Kasumi
-most of twilight caravan
-Creditta