Marriage Grey

Marriage Grey summary: My wife is suspicious!! Why did she marry a guy like me...? Ordinary average guy Tsuchioka Naotsugu ended up with Yoshino, who's perfect in all angles of beauty, know-how, and sociability. It's not "marriage blue" it's everyday life questioning over things, so it's "marriage gray" newlywed life, go! Source (translated): http://grandjump.shueisha.co.jp/manga/marriage.html