This manga comes from Morinaga Milk, who managed to extend a love relationship between an imbecile and a woobie during 36 chapters. This is certainly way inside her comfort zone.
You are now my hero.
I love her work and all but seriously "the idiot and the woob" is her niche.
The fuck's a woobie?
"A "woobie" is a name for any type of character who makes you feel extremely sorry for them. Basically, the first thing you think to say when you see the woobie is: "Aw, poor boy!" Woobification of a character is a curious, audience-driven phenomenon, sometimes divorced from the character's canonical morality." (from TV Tropes)
The woobie in question is Mari from Girl Friends.