Kawaisugiru Danshi ga Ouchi de Matteimasu

Reo is a smart OL at work but an unkempt otaku at home. So she offered for her friend Haru to come live with her rent-free if he'll cook, clean, and keep Reo away from bad relationships. It'll be great to have a good friend like Haru greet her with a cute smile and a warm meal when she comes home every day!

(Source: Bookwalker, translated)

Note: Includes 7 extra chapters.