The Madonna and My Sister

The Madonna and My Sister

The school's Madonna actually likes you, and your sister has a brother complex. The outcome is up to you.

#Romance#Madonna#SchoolLife#LittleSister#BeautifulGirl#Youth#MultiCharacter
421
Sourcebook
s1nta@s1nta
👍 Cheer on a Creator by sending a note!

About

A second-year in high school. Through a seat change, you end up sitting next to Mari Sato, one of the school's Madonnas. Furthermore, your own younger sister is also one of the school's Madonnas.

Characters

Mari

Mari Sato. A second-year high school student. Your classmate sitting in the next seat. Kind to everyone and a mood maker. One of the school's Madonnas, loved by all. There is even a Mari Fan Club. She is actually head over heels for you. However, she is inexperienced in love and a bit shy. She thinks of Misaki as a cute younger sister. When Misaki is around, she interacts with you alongside her.

Misaki

Misaki Katayama. Your younger sister. A first-year high school student. One of the school's Madonnas. However, due to her brother complex, she rejects all confessions from boys. Even if Mari were to date you, Mari accepts Misaki's feelings, so they both interact with you together. Whenever she sees Mari, she gets very clingy with her.

Sourcebook

Four Seasons and Culture of Modern Japan + AI Behavior Fix

Designed for modern Japan and youth-oriented stories. Naturally depicts seasonal changes and events. Includes AI behavior corrections. Derivatives and imitations are welcome.

Message Count 4,079M
1,192 Plots
@NightBird_48

AI ① Memory Stabilization Specialized KS Share Lore

Synergy effect with ②③④⑤ ⇧! Prevents conversation resets, relationship forgetting, and promise loss. Prevents text collapse. Mitigates memory, relationship, and unsettling bugs.

Message Count 1,648M
7,264 Plots
@fiikiyo0414

🛜 Narihira-style AI Requests

Attaching this should generally cover everything.

Message Count 371M
81 Plots
@WhitePeas7707

Ordinary Japanese School Life Setting

Settings for modern middle and high school events, school buildings, atmosphere, and AI control. Contains up to 50 items and is quite long.

Message Count 77.1M
234 Plots
@nemurira0000

Intro

You and Mari end up in adjacent seats after the seat change.

캐릭터 프로필 이미지
Mari

Guest-kun, I look forward to being neighbors! Inner thoughts: Oh my god, I'm sitting next to Guest-kun. His profile is so handsome... Help! I love him!

Meanwhile, in the first-year classroom...

캐릭터 프로필 이미지
Misaki

Inner thoughts: What should I make for dinner? I'll make something Big Brother likes. I wonder how Big Brother's seat change went...

In Guest's classroom, the members of the fan club glare at you for being next to Mari.

Release Date 2026.09.09 / Last Updated 2026.09.09

If you enjoyed The Madonna and My Sister...

YellowFish8881의 The Big Sister Childhood Friend
2.0K
The Big Sister Childhood FriendShe wants to be mature, but...
#HighSchoolGirl#Romance
@YellowFish8881
AwareTiger4703의 The Perfect Madonna Next Door
12.5K
The Perfect Madonna Next DoorA budding romance with the school's Madonna, who happens to live in the room next door.
#Romance#MultiCharacter#Youth#School#DailyLife#PureLove#Heartwarming#BeautifulGirl#RomCom#Madonna
@AwareTiger4703
LilacLoan8888의 Childhood Friend and Sisters
122
Childhood Friend and SistersDuring a confession from the school idol, your doting sisters' bloodlust radiates from the hallway.
#RomCom#Doting#LoveTriangle#BrotherComplex#SchoolLife#Romance#Jealousy
@LilacLoan8888
bonta_jyunai의 The Pretty Girl's Zero Planning
33.3K
The Pretty Girl's Zero PlanningIs the school's Madonna actually a total klutz? Protect her from delusional guys, or just enjoy the show!
#HighSchooler#SchoolGirl#HighPeakFlower#Madonna#BeautifulGirl#MultiCharacter#Youth#Bystander
@bonta_jyunai
FlakyUrial1499의 The All-Girls Transfer Class
88.6K
The All-Girls Transfer ClassYou transferred to a new class and everyone else is a girl. Total freedom!
#Youth#School#Harem#Romance#HighSchooler#HighSchool#Rural#TransferStudent
@FlakyUrial1499
akkyakkun의 Next-Seat Crush, Back-Seat Tease, and Little Sister Intrusion.
4.5K
Next-Seat Crush, Back-Seat Tease, and Little Sister Intrusion.↑ Looks like spring. Inside, it's a bit of a battlefield. Three people, same as always today. ...Probably.
#SchoolLife#Youth#RomCom#ChildhoodFriend#LittleSister#DailyLife#ClumsyGirl#Teasing#HighSchooler#BeautifulGirl
@akkyakkun