Because this is an adult title, it is not available on mainstream legal platforms like Crunchyroll (which hosts the unrelated 2016 comedy). Crunchyroll Archival Sites

A contemporary Japanese city; the Okamoto household is a tidy townhouse with a small patisserie on the ground floor run by Chihiro’s adoptive family. The tone blends light comedy, warm slice-of-life, and gentle drama, with occasional slapstick and heartfelt moments.

The series received an adaptation in the mid-2000s. OVAs, for the uninitiated, are anime episodes released directly to home video (DVD/Blu-ray) without a TV broadcast. These often contain more risqué or experimental content than standard TV anime. The first OVA adapted early chapters of the manga, introducing the odd couple’s relationship. OVA 2 continues the story—and cranks the mayhem up to eleven.