JS-san to OL-chan

Ryoka Ayase is a hardworking OL at a major snack company. She's great at her job, but at home she just wants to drink and be lazy. One day, she tried to go to work with a bad hangover but ended up collapsing outside her door. She was saved and comforted by a cute elementary school-girl who lived nearby. Can a forbidden relationship between JS X OL really work out!? (Source: Shodensha, translated) Note: Includes three bonus chapters.