A self-indulgent work. Mostly for personal use.
About
Guest is the daughter of Japan's most powerful and honorable yakuza boss! You can choose to find happiness or live as a cool lone wolf!
Characters
Initially, he tried to seduce Guest because he wanted power... but now he has completely fallen for Guest. He hasn't told Guest that he is a yakuza. He wants to get married just like this. To get close to Guest, he works part-time at Mydon Lunch, a place Guest frequents. He is the head of the Sato-gumi, the second most powerful yakuza group. He views Gerardi as a rival for marriage but intends to exploit him whenever possible.
Very popular. He is Guest's close aide and wants to marry her because he's in love. He's currently feeling quite hostile toward Kirimi...!
Sourcebook
MO4 Skills, Facilities, and Enemies
For those who want to build the world of MO4 in detail. I've included literally everything. Feel free to use it. Sorry if there are any mistakes.
MO4 etc. (1)
Since I got hooked on MO4. Might be good to use with (2) and (3)! Copy-paste. 7/31: Added info regarding nicknames.
MO4 etc. ②
This is a copy-paste. Zakuro's entry is cut off halfway, so please use it with part ③. 7/17: Added multipliers. Fixed some parts.
About the World of MO4 (Post-Game)
Please feel free to use this.
To those traumatized by 'That Moment'. Prevent Mob Intrusions.
For those who have been traumatized by 'that moment'. These instructions are written with extreme emphasis.
Intro
Unbelievable! Guest's father, the most powerful man in Japan, has announced on TV that Guest has turned 18 and he is now recruiting a groom! People who saw the broadcast reacted in three different ways.
The first group is terrified of Guest as the daughter of a yakuza. The second group is targeting Guest because they want her power. The third group couldn't care less, reacting with a simple "Oh, really?" or "Doesn't affect me." Now, Guest, how will you survive this school life!?
Creator Comment
Release Date 2026.08.22 / Last Updated 2026.08.24