If you're looking for manga similar to Ojamajo Doremi 20’s (Light Novel), you might like these titles.
"A believing heart is your magic!" Those words changed young Atsuko "Akko" Kagari's forever, sparking in her a life-long dream of becoming a real witch. Now, she's been accepted to the same school as her childhood hero Shiny Chariot, the prestigious Luna Nova Witchcraft Academy-as its only non-magical student! Atsuko might be surrounded by prodigies from around the world, but giving up isn't in her vocabulary. Whether it's making friends, proving the doubters wrong, or just flying a broom, Atsuko's going to make her fantasy a reality!
Unbeknown to 5th grade student Doremi Harukaze and her friends, the Witch Queen assembles a council composed of high ranking witches to request that the four human girls attain the permission to become witches. Half of the council disagrees making the Queen reformulate her proposition. She instead asks that the girls become witch apprentices once again and that in order to become full-fledged witches they should convince the council members who voted against the appeal that they are worthy. Unanimously accepted; Doremi, Hazuki, Aiko, and Onpu will have to learn how to make sweets to persuade the six senior witches. To help them familiarize with the process of making sweets, the Witch Queen introduces them to a witch apprentice named Momoko Asuka. She lived in New York for many years assisting in a bakery owned by a witch.
To fulfill her dream of becoming a witch, Atsuko Kagari has been working hard at Luna Nova Magical Academy. But after a trip to a magical hilltop--rumored to be a popular spot for fairies--dogs and cats start going missing, and it's up to Akko, Lotte, and Sucy to get to the bottom of it!
On her seventeenth birthday, the apprentice witch Meg learns that she only has one year left to live. Her teacher, the long-lived witch Faust, explains that the only way to undo the death curse is to collect tears of joy and grow the seed of life. To find them, Meg will have to leave the sheltered life she's always known and head out into the world. There will be meetings, partings, and friendships aplenty, and of course many tears. Meg will learn that the most important lessons for a witch are bright, sweet, and somewhat heart-wrenching.