Sekaiichi Kawaii Ore no Yome

Tsuyoshi has to be the luckiest guy in the world - he gets to spend every night in matrimonial bliss with his buxom high school sweetheart, and they're even planning a baby together! Nevermind that she's been spending more time out of the house lately ever since an encounter with his muscled ladykiller former classmate - would his sweet, shy Tsubasa ever lie?

(Source: Irodori Comics)