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Kansen 3 ~Shuto Houkai~

姦染3 ~首都崩壊~

TitleKansen 3 ~Shuto Houkai~
Original title姦染3 ~首都崩壊~
AliasesInfection 3
LengthMedium (10 - 30 hours)
PublishersSpeed & Space Project Co., Ltd. & Lune
Shares characters
Kansen 5 ~The Daybreak~
Kansen ~In'yoku no Rensa~
Kansen 2 ~Inzai Toshi~
Kansen 4 ~The Day After~
Same setting
Kansen Ball Buster
Related anime[DB-ANN] Kansen 3: Shuto Houkai (OVA, 2010)


Four years have passed since the terrible events narrated in Kansen 1 and 2, and the terrifying plague which depopulated the Tohoku region of Japan has been reduced to a mere (bad) memory, thanks to drastic quarantine measures coupled with an effective vaccine.

But the Unknown virus is not dead yet and soon, very soon, an unescapable doom will fall upon Wataru Ayase and his family and friends, trapping them inside the "Hell on Earth" madhouse which originally was their home city, Tokyo...

Sex in Public Places 3.0 Societal Collapse 3.0 Summer 3.0 Villainous Hero 3.0 Protagonist's Childhood Friend as a Hero 3.0 Timed Choices 3.0 Action 3.0 ADV 3.0 High Amount of Bad Endings 3.0 Epidemic 3.0 Desperation 3.0 Bad Endings with Story 3.0 Read Text Marking 3.0 Heroine with Glasses 3.0 Classic Tsundere Heroine 3.0 Protagonist's Childhood Friend as a Heroine 3.0 Yakuza 3.0 Netorare Type B 3.0 Non-blood-related Brother/Sister Incest 3.0 Illness 3.0 Madness 3.0 Confinement 3.0 High Sexual Content 3.0 Combat Capable Friends 3.0 Group Sex of One Female and Several Males 3.0 Student Heroine 3.0 Unlockable Routes 3.0 Modern Day Tokyo 3.0 Modern Day Shibuya 3.0 High Amounts of Rape 3.0 More Than Seven Endings 3.0 Student Protagonist 3.0 Protagonist's Senpai as a Heroine 3.0 School Sports Club Member Heroine 3.0 High School Student Protagonist 3.0 Male Protagonist 3.0 Drama 3.0 Other Perspectives 3.0 Multiple Endings 3.0 Bad Ending(s) 3.0 Reverse Rape 2.8 Gang Rape 2.8 Game Over 2.2 Protagonist's Younger Sister as a Heroine 2.0 Descriptions of Violence 2.0 Animals 2.0 Adolescent Romance 2.0 Pettanko Heroine 2.0 Branching Plot 2.0 Musician Heroine 2.0 Female Domination 2.0 Defloration 2.0 Heroine with Tights 2.0 Built-in Flowchart 2.0 Death of HeroS 2.0 Multiple Penetration 2.0 Bukkake 2.0 Inflation 2.0 Doggy Style 2.0 Female Ejaculation 2.0 Outdoor Sex 2.0 Huge Insertion 2.0 Cowgirl 2.0 Standing Sex 2.0 Ahegao 2.0 Group Sex 1.8 Big Breast Sizes Heroine 1.5 Heroine With Kansai Accent 1.3 Bloody Scenes 1.0 Excessive Semen 1.0 Early Sexual Content 1.0 Enforced Playing Order 1.0 Joke Endings 1.0 Reverse Cowgirl 1.0 Central Hero 1.0 Naked Sprites 1.0 Heroine with Swimsuits 1.0 Cannibalism 1.0 Swimming Club 1.0 Cunnilingus 1.0 Sixty-nine 1.0 Government 1.0 Deepthroat 1.0 Protagonist's Sister as a Heroine 1.0 Blowjob 0.8 Boobjob 0.5 Handjob 0.3 Anal Penetration 0.3 Fingering 0.3 Masturbation 0.3 Fisting 0.2

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Main characters

Side characters

Kugayama Mizuki久我山 瑞樹
MeasurementsHeight: 168cm, Weight: 57kg, Bust-Waist-Hips: 96-62-92cm
HairIntake, Pink, Shoulder-length, Sidehair
BodyAverage Height, Big Ass, Big Breast Sizes, Teen
ClothesBelt, Cardigan, Collar, Cowboy Hat, Crop Top, Off-The-Shoulder Sweater, Short Shorts, Skirt, Tank Top
RoleChildhood Friend, Yakuza
Engages inDrug Abuse
Voiced byKasuga An

Make an appearance

HairBun, Sidehair, Violet
ClothesBracelet, Hair Tie, Necktie, Pleated Skirt, School Uniform
RoleSchool Science Club Member, Student


Yoshino is a member of the Astronomy club and helps out with the planning of the club's summer activities.