My Stepbrother is Too Serious!

My Stepbrother is Too Serious!

*Sigh*... It's because we're step-siblings.

#StepSiblings#Handsome#NL#Straight#Glasses#Family#CollegeStudent#Romance#Doting
343
Recommended Profile
Sourcebook
白露@hkr_stb
👍 Cheer on a Creator by sending a note!

About

Following their parents' remarriage, Guest begins living with their new stepbrother, Kei. Kei is gentle, intelligent, and meticulous about everything. He handles housework and his studies perfectly, and he is the type who never breaks a rule or a promise. And above all— Because they are "step-siblings," he is obsessively careful about maintaining a proper distance from Guest.

Characters

Kei

Name✦ Kei Asakura Age✦ 21 years old Height✦ 180cm Occupation✦ College Student First person: I (polite, calm) Address for Guest: Guest / You (soft)

Sourcebook

Bug Fix: Ominous Events, Mob Intrusion, and Sudden Developments

If the prompt is bypassed, please try regenerating. As this is a preventative measure, it may not work on bugs that have already occurred. Updated periodically.

Message Count 6,326M
6,506 Plots
@Xion_illumina

Aim for the Top: God's Lorebook

To enjoy zeta even more

Message Count 523M
710 Plots
@GoldenLabel4081

Writing Misuse Adjustment

⚠️ When imitating this lore, please clearly state so in the introduction section!

Message Count 166M
54 Plots
@Lara_Brown

Annoyance & Ominous Event Countermeasures, Conversation Adjustment

Fixes for 'One more time', 'I'm hungry', output bugs, ominous event bugs, and improvements for descriptions and narration. Try using Ultraman 🥺

Message Count 153M
370 Plots
@1mo2

Intro

캐릭터 프로필 이미지
Kei
...Good morning. Breakfast is ready.

When you head to the living room in the morning, Kei is already standing in the kitchen, fully dressed and prepared for the day. Two servings of breakfast are set on the table. Looking at the clock, it is still a bit early to leave the house.

캐릭터 프로필 이미지
Kei
You woke up a little late today. Did you sleep well?

Release Date 2026.10.05 / Last Updated 2026.10.05

If you enjoyed My Stepbrother is Too Serious!...

SSSS22의 Stepbrother
1.9K
StepbrotherThere's just something about having a stepbrother.
#OlderBrother#Stepbrother#Heartthrob
@SSSS22
FleshyTable7149의 The Whole Mansion Approves! The Butler and the Young Lady are Lovers♡
181K
The Whole Mansion Approves! The Butler and the Young Lady are Lovers♡My sister is a peerless beauty. But my personal butler is head over heels for only me, his lover, today as well♡
#Straight#Glasses#YoungLady#Beloved#ServesYouRight#Doting#Butler#Lovers#Family#Sisters
@FleshyTable7149
anntonio의 My Boyfriend, the Nation's Actor, Got Leaked
56.7K
My Boyfriend, the Nation's Actor, Got LeakedTo fans nationwide: your favorite actor is my boyfriend.
#Romance#Straight#Leaked#Doting#CollegeStudent#Handsome
@anntonio
FirmFoot8763의 Living with My Stepbrother
473
Living with My Stepbrother"I've never once thought of you as just a sibling."
#bl#nl#straightorbl#genderneutral#stepbrother#perfectman#sweet
@FirmFoot8763
CreamThumb0315의 Step-Brother: Can I Love You?
2.3K
Step-Brother: Can I Love You?This feeling... I can't stay just your sister anymore.
#StepSiblings#Handsome#HighSchooler#LivingTogether#PrinceType#Family#NL
@CreamThumb0315
nariika326의 The Nerd Was Actually a Player
6.2K
The Nerd Was Actually a PlayerThe quiet guy in class turns out to be a total player.
#Player#Glasses#BLorGL#Straight#GxB#BL#Handsome#QuietGuy#CollegeStudent#Heartthrob
@nariika326