Kansen Ball Buster

姦染 Ball Buster

TitleKansen Ball Buster
Original title姦染 Ball Buster
AliasesInfection Ball Buster, Kansen BB
LengthShort (2 - 10 hours)
Publishers Lune & Mints & Space Project Co., Ltd. & Speed
Shares characters
Kansen 5 ~The Daybreak~
Same setting
Kansen 3 ~Shuto Houkai~
Related anime[DB] Kansen Ball Buster The Animation (OVA, 2013)


Kansen Ball Buster is split into two different scenarios titled "The Other Aspect" and "The Chronicle Teller."

"The Other Aspect" features Senoo Kazumi who is currently living alone and job hunting in Tokyo. One day his sister Tsugumi comes to visit him to make sure that he is still alive, since he has not spoken to his family in a while. On the same day, the virus known as Unknown LV4 breaks out causing panic and mayhem across the city. Kazumi becomes determined to save both his sister and his childhood friend Shizuka from their summer camp at the all girl private school. Will he , his sister, and his childhood friend make it to safety in the city or become just another infected individual wandering the city in search of prey?

"The Chronicle Teller" is a collection of 10 - 20 scenes from each of the first five Kansen games. It also explains how each outbreak started, some explanation of the different virus mutations, and a little bit of background information for each of the first five games in the Kansen series.


Senoo Kazumi
Senoo Kazumi妹尾 克己 O
MeasurementsHeight: 171cm, Weight: 62kg
Hair, Crew Cut, Leg Hair, Pubic Hair, Short
Eyes, Blue, Red
Body, Average Height, Muscular, Olive, Slim, Young-adult
Clothes, Baggy Pants, Panty Gag, Shirt, Sports Shoes, T-shirt
Items, Baseball Bat
Personality, Brave, Honorable, Idiot, Ore, Protective
Role, Childhood Friend, Full Brother, Hero, Living Alone, Older Brother, Submissive Partner
Engages in, Fighting, Job Hunting, Self-sacrifice, Unarmed Fighting
Subject of, Avoidable Rape, Mind Control, Netorare, Survival, Viral Infection
Engages in (Sexual), Bathroom Sex, Cowgirl, Group Sex of One Male and Several Females, Incest, Mutual Masturbation, Outdoor Sex, Piledriver, Quickie Fix, Reverse Cowgirl, Standing Sex, Virgin Sex
Subject of (Sexual), Anilingus, Balls Sucking, Blowjob, Boobjob, Facesitting, Footjob, Foreskin Play, Twin Blowjob


He loves very much Tsugumi, his younger sister and Shizuka, his childhood friend ( not in a romanticaly way for his sister ).

<hidden by spoiler settings>He is apparently into cuckolding, enjoying earing his little sister experiences. But he feels frustrating when his sister or childhood friend have sex with someone else in front of him.

He had a secret crush in his youth on Shizuka but he always thought he wasn't good enough for her and he's been trying since to forget his feelings for her.

Main characters

Senju Shizuka
Senju Shizuka千住 静 A
MeasurementsHeight: 151cm, Weight: 41kg
Hair, Brown, Long, Sidehair, Straight
Eyes, Brown, Red, Tareme
Body, Average Height, C Cup, Pale, Slim, Teen
Clothes, Knee-high Socks, School Uniform, Spats, Sports Shoes, Tennis Outfit, Torn Clothing
Items, Baseball Bat
Personality, Closet Pervert, Friendly, Kind, Refined, Shy, Watashi
Role, Childhood Friend, Dominant Partner, Friend, High School Student
Engages in, Avoidable Rape, Lacrosse
Subject of, Avoidable Rape, Other Route Death, Survival, Viral Infection
Engages in (Sexual), Avoidable Sex with Others, Bathroom Sex, Blowjob, Footjob, Group Sex of One Male and Several Females, Mutual Masturbation, Virgin Sex
Subject of (Sexual), Bukkake, Piledriver, Reverse Cowgirl, Reverse Spitroast
Voiced byMikuro


She is the childhood friend of the Senoo siblings. She is younger than Kazumi.
<hidden by spoiler settings>
We learn in her dark route than she know everything about the sex life of Tsugumi, she likes heard Tsugumi's stories for her masturbation session. She even peeped at her having sex.

She's apparently into SM, her as the Sadist.

She is secretly in love since her childhood days of the protagonist but is too shy for saying it to him.

Senoo Tsugumi
Senoo Tsugumi妹尾 丞実 B
MeasurementsHeight: 155cm, Weight: 49kg
Hair, Black, Ponytail, Side Tail, Spiky Bangs
Eyes, Blue, Red
Body, Average Height, D Cup, Pale, Slim, Tanline, Tanned, Teen
Clothes, Hairpin, Hair Tie, New Type School Swimsuit, Tracksuit, Unusual Hair Ornaments
Personality, Atashi, Brocon, Closet Pervert, Slutty
Role, Childhood Friend, Dominant Partner, Full Sister, High School Student, Not an Anal Virgin, Not a Virgin, Sex Friend, Younger Sister
Engages in, Avoidable Rape, Mind Control, Swimming
Subject of, Avoidable Rape, Other Route Death, Survival, Viral Infection
Engages in (Sexual), Ahegao, Avoidable Sex with Others, Bathroom Sex, Blowjob Duck Face, Boobjob, Casual Sex, Comfort Sex, Condom Sex, Group Sex of One Male and Several Females, Mutual Masturbation, One-night Stand, Outdoor Sex
Subject of (Sexual), Cowgirl, Piledriver, Quickie Fix, Reverse Cowgirl, Spit-roast
Voiced bySakurai Alice


Tsugomi is the little sister of the Kazumi and the childhood friend of Shizuka. She is a member of the swimming club, she is cute and very popular with boys and girls.
<hidden by spoiler settings>
It reveals in her dark route that she lost her virginity one or two years ago and enjoy even her first experience with Ijiri-Kun ( one of her club member ) who didn't hurt, and then she start dating him.
After he cheating on her, she left him ( despite doing the same thing with other boys ). She is a sex addict, had severals partners ( 4 differents minimum ) and a lot of sex intercourses with her classmates, senpais and kouhais ( a single partner or severals at the same times ). She graduates from middle school 6 or 7 months ago and haven't had sex since.

She maybe have a brother complex, not sure because she show this side of her personnality after being infected.

She is a closet pervert, during her sexual intercourse with the protagonist, she tells him all what she experienced before, with details.

Despite being very experienced, she always had safe sex ( with condoms or with outside ejaculation ).

Side characters

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