To Love Ru Manga Shrink

http://www.mangareader.net/140-8774-1/to-love-ru/chapter-28.html
http://www.mangareader.net/140-8775-1/to-love-ru/chapter-29.html

Chapters 28 and 29 of the To Love Ru manga. The protagonist, Rito Yuki, gets shrunk by one of Lala’s inventions and has to survive the school day at one inch tall.

Personally, the whole ecchi harem thing doesn’t do much for me.  Throw in a shrink story and a couple of giantesses. Then you have my attention.