Please Teacher! おねがい☆ティーチャー (Onegai☆Teacher)

Alternative Name: 拜託了☆老師 (Bài Tuō Le☆Lǎo Shī)

Genre: Romance, Sci-Fi, Comedy, Drama, Aliens, School, Ecchi, 

               Alternative Version

Description: 

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.

Episode: 12 + 1 OVA + 1 Special + 1 OVA + 1 OVA

Original Run
Series: January 10, 2002 – March 28, 2002
OVA: October 25, 2002 
Special: October 25, 2002
OVA: March 28, 2003

OVA: March 26, 2014

Studio: Daume

List of Songs (directly to CrimNight Muse Garden)

1. Shooting Star                             [Opening]

2. Sora no Mori De                  [First Ending]

3. Love a Riddle                     [Second Ending]
4. Tiny Days                                     [Insert]
5. Sora ha Kataranai                   [Insert 11]

Onegai Teacher - Vocal Best Album
1. I Can't Get Over Your Best Smile
2. Ano hi no Kimi e
3. Senecio
4. Snow Angel

Onegai Teacher - Sereson 
1. Itsumo Omotteru Koto

Manga: Onegai Sensei!

Published: September 27, 2001 – December 27, 2002

Volume: 2

Light Novel: Onegai Teacher: Mizuho and Kei's Milky Diary

Published: March 1, 2003
Volume: 1

Here is the preview: