English Title: Onegai Teacher: Mizuho and Kei’s Milky Diary
Japanese Title: おねがい・ティーチャー -みずほと桂のMilky Diary-— Onegai Teacher: Mizuho to Kei no Milky Diary — “Please, Teacher! Mizuho and Kei’s Milky Diary”
Author: Gou Zappa
Illustrator: Taraku Uon, Hiroaki Gouda
Translator: Toshi Hosaka
Genre: Romance, Sci-fi 
Original Run: 2003
English Run: 2005
Volumes: 1
English Publisher: ComicsOne
Volumes Published in English: 1 (COMPLETE)
Average Price Per Volume: Paperback – $10

• Japanese Website
• MAL Entry — Forum

Synopsis: Kusanagi Kei, a high-school student living with his aunt and uncle, has an encounter with a female alien. This alien is revealed to be a new teacher at his school. Later, he is forced to marry this alien to preserve her secrets. From there, various romantically-inclined problems crop up repeatedly.

Volume 1 – Mizuho and Kei’s Milky Diary
Amazon — Barnes and Noble — Book Depository

Anime (Source Material)

MAL Entry -- 12 episodes -- Aired January 2002 – March 2002
Amazon — RightStuf

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