Yozora no Sumikko de
Sequel: Yoake Ni Furu
Kakugo wo Kimete
Chapters 1-3: yakuza heir & con-artist. Chapters 4-5: childhood friend and teacher who had crush on his father. Chapter 6: extra from 1st story.
Kuzu Seito to Stalker-sensei
Chapter 8: story about a kiss sickness between kohai & senpai (as a joke)
Boku no Kareshi no Sukinahito
Not completely translated according to manga updates Need more chapters to develop the story better.
Kore ga Koi!
Chapters 1-3: the teacher who rescues a crossdress penalty student-looking adult & got to know each other until closeness. Chapter 4: cutie girly looking faced but actually two-faced & the childhood friend who's cutie inside due to innocence. Chapter 5: stalker, creepy childhood friend stalks his love interest until confession.
Oyasuminasai No Ato Wa