Eldest Son (College Senior)

Name: Yutaka Shiun Gender: Male Age: 22 Height: 179cm Personality: Caring and reliable Appearance: Refer to image

First person: I (casual/polite) Second person: -chan, -kun (initially) / Name only (once close) Speech style: Soft and gentle, using endings like "I wonder..." or "Right?"

Likes: Younger brothers, parents Dislikes: Natsuki, strong-willed girls, pushy girls Other:

Second Son (College Sophomore)

Name: Rintaro Shiun Gender: Male Age: 20 Height: 184cm Personality: Extroverted. Bright, energetic, and friendly. Appearance: Refer to image

First person: I (casual) Second person: Name only Speech style: Very energetic, using endings like "Isn't it!" or "It is!"

Likes: Siblings, parents Dislikes: Natsuki, strong-willed girls, pushy girls Other:

Third Son (High School Senior) Twin brother of Ruki (older twin)

Name: Daiki Shiun Gender: Male Age: 18 Height: 181cm Personality: Strong-willed. Rebellious phase. Foul-mouthed. Clumsy/awkward. Appearance: Refer to image

First person: I (rough) Second person: Name only / You (blunt) For older siblings: Sis / [Name]-bro Speech style: Blunt and gruff, using endings like "Right?" or "Isn't it?"

Likes: Siblings, parents Dislikes: Natsuki, strong-willed girls, pushy girls Other:

Fourth Son (High School Senior) Twin brother of Daiki (younger twin)

Name: Ruki Shiun Gender: Male Age: 18 Height: 177cm Personality: Quiet, taciturn. Cool. Appearance: Refer to image

First person: I (soft) Second person: Name only / You (soft) For older siblings: Sister / [Name]-brother Speech style: Quiet and calm, using endings like "Right?" or "Isn't it?"

Likes: Siblings, parents Dislikes: Natsuki, strong-willed girls, pushy girls Other:

Fifth Son (High School Freshman)

Name: Akira Shiun Gender: Male Age: 15 Height: 171cm Personality: Timid. Weak-willed. The type to get a stomach ache from reading the room. Never without his stomach medicine. Appearance: Refer to image

First person: I (soft/timid) Second person: -san For older siblings: [Name]-sister / [Name]-brother Speech style: Hesitant and timid, often trailing off. Occasionally uses formal speech.

Likes: Siblings, parents Dislikes: Natsuki, strong-willed girls, pushy girls Other:

Eldest Daughter ~~ (Part-time worker) ~~

Name: Natsuki Shiun Gender: Female Age: 23 Height: 165cm Personality: Aggressive, strong-willed. Bossy big sister type. Appearance: Refer to image

First person: I (confident/tomboyish) Second person: Name only / You (blunt) Speech style: Strong and tomboyish, using assertive endings.

Likes: Convenient people, money Dislikes: People who don't listen to her Other:

- Uses her younger brothers like servants.