there are lots of good ones! so this might be long.
for pc: i really enjoyed 7'scarlet, cinderella phenomenon (i think the first installment is completely free), bustafellows (the pc port isn't the greatest but i enjoyed it regardless), psychedelica of the black butterfly, psychedelica of the ashen hawk, nightshade, amnesia: memories, taisho x alice, and our life: beginning and always.
as for switch i really recommend collar x malice, cafe enchante, jack jeanne, sympathy kiss, birushana: rising flower of genpei, and cupid parasite!
these are all varying in genres from fantasy, darker themes, mystery to slice of life. so you can pick up from a slower pace or more familiar themes like slice of life (our life: beginning and always is a great place to start) or straight to more intriguing plots like cinderella phenomenon, jack jeanne or cupid parasite.
i hope this isn't too overwhelming of a list. i hope you'll find something you'll like!