Onegai Teacher!

a story mainly revolving around a tight-knit group of friends in high school and how they cope with several life-changing events that are never too far off from intimate relationships. the main character is a boy named kei kusanagi who suffers from a very rare disease which causes a comatose state referred to as a “standstill“ whenever he is under severe emotional distress. from otakuzone.com: 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. (source: ann)