Yuuto’s adoptive sister, and Anri’s older twin sister. She’s half British and half Japanese, and has gorgeous, natural blonde hair.

She’s cheerful, emotionally expressive, and easy to get along with. Thanks to Yuuto’s inspiration, she works hard doing volunteer work.

She tends to blush easily when exposed to X-rated things. She loves Yuuto dearly as a brother... but maybe as more than just a brother?

Yuuto’s adoptive sister, and Anzu’s younger twin sister. Although Anri is half British, like her twin sister, her Japanese traits are more dominant.

She’s a very cool, mild-natured person who also works as her grade’s student representative. She is also notoriously acid-tongued, and acts mature and sensible at all times, but in truth, she’s a child at heart.

She’s slightly interested in Yuuto as a member of the opposite sex, but acts somewhat uncaring towards him without realizing it. She is also a rather covetous person. Once you set off her jealousy, her mind enters ”search & destroy” mode.

A childhood friend of Yuuto’s, younger by one year, and also Hikaru’s older identical twin sister. Hekiru has beautiful, sapphire eyes, and is a gifted artist.

She speaks in a monotone voice and marches to the beat of her own drum, sucking people in around her via her mysterious aura.

She claims that she came to Japan to fulfill a certain promise... And her objective is—Yuuto’s virginity?!

A childhood friend of Yuuto’s, younger by one year, and also Hekiru’s younger identical twin sister. Hikaru boasts that she and Hekiru are ”mirror” twins (with full bilateral symmetry.)

She’s a popular model with a slight boyish appeal. Her speech is calculated and glib, and she handles everything flawlessly in a matter-of-fact fashion.

She’s also a noted misandrist whose affection towards Hekiru transcends both sisterly and sexual boundaries. As such, she is often cold and unforgiving towards Yuuto.

A member of the theater club and Torakichi’s younger twin. Tsubame and Yuuto have always been in the same class at school, ever since they were little, and they’re good friends because of that.

She’s always ready to help with her ingenuous smile, and is revered as an idol within the school due to her attractive assets.

Unfortunately, due to her timid nature and lack of self-confidence, she has trouble fully expressing herself both on the stage and in front of the boy she likes.

Tsubame’s best friend, who works hard at her part-time job to provide for her family, since she was raised in a single-mother household. Izumi looks cute on the outside, but her personality, unfortunately, is anything but.

She’s rowdy and ostentatious, but always hides her true feelings. She’s also quite cowardly and weak-willed, always clinging to others for help.

She proclaims herself to be Yuuto’s ”rival”and always verbally harasses him, but to all outsiders, it only appears as though she’s flirting with him.