From OneManga:
With his phrase "don't you dare make girls cry," Makoto Tobita has failed his 30th confession, but that won't stop him. Promising to do anything for the girl who smiles at him, no matter what it is, what will happen now when the alien fighting - giant girl, Mana Eimiya, is in love with him?
Comments:
-Little guy, gigantic world-saving girlfriend.
-Mana's reactions to pain are oddly cute?...(or am I just a sadistic bastard? -.-)
-Kinda like Midori no Hibi but with the roles reversed. Its kinda funny, I probably keep up with this one.
-On a side note, I got a good laugh at this:
OneManga link:
http://www.onemanga.com/Super-Dreadnought_Girl_4946/