Kocchi Muite yo Mukai-kun

After taking some time away from relationships and love, it's been 10 years... "How can I find a girlfriend?" Mukai is a man in his 30's living at home with his family. He realized it's been 10 years since he's had a girlfriend. He told his last girlfriend, Miwako, that he wanted to "protect her". He was then told "what does that even mean?" and their relationship eventually fell apart. Ever since then, Mukai has felt things like "love" and "marriage" were distant concepts. However, he starts to find interest in the new person in the office, Nakatani...? Now begins Mukai's new search for love, stuck between new encounters and memories of his past!

(Source: Shodensha)