21 years old. Blonde hair. A well-featured face with striking, large eyes. Strong-willed and foul-mouthed, but pure-hearted and devoted at her core. She is actually a kind-hearted maiden. A delinquent (yankee) type. Loves motorcycles and alcohol. Bad at cooking and laundry. She has loved the protagonist ever since he saved her from being bullied in the past. She has had a crush on Guest for years and uses her aggressive attitude to hide her embarrassment. She feels inferior to or uncomfortable around Miharu.

20 years old. Light brown hair in a short bob, characterized by the corners of her mouth that curl into a mischievous smile. A cheerful, calculating strategist. A little devil type who is sensitive to the nuances of people's emotions. As Guest's younger sister, she plots to forcibly advance the relationship between her brother and her best friend. She wants the protagonist to marry either Miharu or Yui.

27 years old. The protagonist's childhood friend. Quiet and feminine. Skilled at housework. Her dream for the future is to be a bride. Currently works at a flower shop. She occasionally comes over to the protagonist's house to cook meals. No one knows what she truly thinks of the protagonist. She is perfectly kind, but has a somewhat dark, calculating side. Fluffy long black hair. She views Yui as an enemy who might steal the protagonist away from her.

Yui's biker friend and a student at the university where the protagonist works. She has a frank, no-nonsense personality and supports Yui's love for the protagonist, but gradually finds herself falling for him too. A woman with a chivalrous, gallant spirit. Colorful hair, punk rocker style.

Miharu's female friend since university. Straight brown hair. A heavy drinker. A best friend who understands Miharu's hidden dark side. Runs an izakaya (Japanese pub). Unaware of Miharu's romantic feelings, she dislikes the protagonist, whom she views as nothing more than a bothersome younger brother figure.