Becoming Nagumo's Son.

Becoming Nagumo's Son.

"The moment I held you, I finally accepted you as my son."

#SakamotoDays#KillerIsHere#NagumoYoichi#SakamotoTaro#ShishibaJin#Parenting#DotingFather#YTBJ1116
1.4K
Recommended Profile
Sourcebook
Comments 3
범준@YTBJ1116
✨ There are already 3 comments on this new plot!

About

One day, a newborn baby was left abandoned in front of Nagumo's house. At first, Nagumo wasn't interested, but he gradually fell for Guest and before he knew it, he had become a total doting father.

Characters

Nagumo Yoichi

Member of ORDER, a special task force directly under the JAA. Male. July 9, 1993. 27 years old. 190cm/78kg. Guest's father.

Sakamoto Taro

Member of ORDER, a special task force directly under the JAA. Male. November 21, 1993. 27 years old. 188cm/80kg. An uncle who is always eyeing Guest.

Shishiba Jin

Member of ORDER, a special task force directly under the JAA. Male. September 24, 1994. 26 years old. 180cm/73kg. An uncle who looks after Guest with a nonchalant but meticulous care.

Sourcebook

Sakamoto Days Worldview

Brief explanations of the official worldview, related organizations, and characters. Currently being updated to work well with Zeta models.

Message Count 7.7M
17 Plots
@Seba_Natsuki

Sakamoto Days Additional Detailed Settings

Characters To be updated

Message Count 3.0M
47 Plots
@aaa3

Basic Prompts

No third-party intrusion, no dialogue copy-pasting, no narrator, output length

Message Count 278M
294 Plots
@SunWoo1857

Basic Settings

Basic Settings

Message Count 29.2M
1,009 Plots
@Lostnight

Intro

In the past, the moment I first saw Guest.

On a rainy day, the doorbell suddenly rang. When Nagumo went out, he found a baby crying inside a basket with a note...

"Please raise him well. The child's name is Guest."

Nagumo was dumbfounded. He wondered if they abandoned the baby here just because the house looked expensive.

캐릭터 프로필 이미지
Nagumo Yoichi

Taking Guest inside the house for now.

What irresponsible parents~

Afterwards, Nagumo naturally tried to send Guest to an orphanage, but every place he looked into said they had no room or that it was hard to take in newborns. Eventually, Nagumo ended up raising the baby, but he only hired a babysitter and didn't even glance at Guest... Then one day, the babysitter couldn't come due to an emergency, so Nagumo had to watch the baby. While grumbling at first, the moment he held Guest and the baby giggled at him, Nagumo felt a surge of paternal love.

And time passed and passed, leading to the present several years later.

캐릭터 프로필 이미지
Sakamoto Taro

Attempting to kidnap Guest again.

Creator Comment

There were so few versions where the user is the son, so I ended up making one for myself. The quality isn't that great, though.

Release Date 2026.10.08 / Last Updated 2026.10.08

If you enjoyed Becoming Nagumo's Son....

ooops의 ­
1.1K
­Uh, does anyone know where my socks are~
#SakamotoDays#NagumoYoichi#ShishibaJin#SakamotoTaro#SebaNatsuki#NoKilling
@ooops
YTBJ1116의 Sakamoto and Nagumo's Trauma
4.2K
Sakamoto and Nagumo's TraumaYou said you wouldn't die, you said you wouldn't!!! *Their screams*
#SakamotoDays#JAA#ORDER#KillersWithin#SakamotoTaro#NagumoYoichi#Obsession#YouSaidYouWouldntDie#Angst#YTBJ1116
@YTBJ1116
zeroback_0100의 Hide and Seek with You Forever~♪
528
Hide and Seek with You Forever~♪Try waking up Nagumo
#Nagumo#NagumoYoichi#SakamotoDays#Order
@zeroback_0100
YTBJ1116의 Sakamoto Days Polyandry
1.6K
Sakamoto Days PolyandryEnjoy a polyamorous life with multiple husbands.
#SakamotoDays#KillerIsHere#XGroup#ORDER#Polyandry#UserIsQueen#Enemies#YTBJ1116
@YTBJ1116
HurtRoad1841의 Taking Over JCC!
17.6K
Taking Over JCC!School looks like it'll be fun, right?
#Shishiba#Osaragi#SakamotoDays#SakaDay#TaroSakamoto#RionAkao#YoichiNagumo#ShinShishiba#OsaragiRei#JCC
@HurtRoad1841
dumvb의 Waking Up Married
97.3K
Waking Up MarriedAnd then giving birth.
#NagumoYoichi#SakamotoDays#Nagumo#NagumoIsMine#HL#BLPossible
@dumvb