Following the death of their parents, Akira made it a solemn duty to ensure his sister could live a normal existence, doing everything within his power to bring happiness into their inconstant lives. As Akira’s bond to Aya inevitably grew closer, others began to jealously whisper how the siblings were forging a relationship that went beyond the accepted conventions of brother and sister; allegations neither showed particular concern towards. Yet this idyllic innocence was not meant to last, and the devotion between Aya and Akira would be sorely tested by an incomprehensible world they never knew existed – a reality that threatens to smother both in malicious darkness. [From Eroge Review]
Zaishuu -The Sin- has not appeared in our Steam sample enough to calculate it's similar novels... sorry!
A novel needs atleast 20 owners before it's similarity is calculated.
| Name | Characters | Importance | Weight |
|---|---|---|---|
| Ushanka Clothes | 1 | 3.49 | 2.42 |
| Monster Hunter Role | 1 | 3.32 | 2.30 |
| Smoking Engages in | 2 | 2.04 | 2.24 |
| Beret Clothes | 2 | 1.99 | 2.19 |
| Video Camera Items | 1 | 3.12 | 2.16 |
| Waitstaff Role | 2 | 1.81 | 1.99 |
| Off-The-Shoulder Sweater Clothes | 1 | 2.71 | 1.88 |
| Coat Clothes | 2 | 1.70 | 1.87 |
| Dual-Wield Weapon Items | 1 | 2.69 | 1.86 |
| Kemonomimi Hair | 1 | 2.49 | 1.73 |
| Drawing Engages in | 1 | 2.47 | 1.71 |
| Vaginal + Anal Tentacle Penetration Subject of (Sexual) | 1 | 2.37 | 1.64 |
| Non-human Role | 1 | 2.31 | 1.60 |
| Big Breasts Body | 3 | 1.13 | 1.57 |
| Heterochromia Eyes | 1 | 2.25 | 1.56 |
| Hairpin Clothes | 2 | 1.40 | 1.54 |
| Twin Handjob Engages in (Sexual) | 1 | 2.21 | 1.53 |
| Spats Clothes | 1 | 2.20 | 1.53 |
| Chinese Dress Clothes | 1 | 2.20 | 1.52 |
| Superhuman Role | 1 | 2.19 | 1.52 |
| Swordsmanship Engages in | 1 | 2.15 | 1.49 |
| Hidden Vibrator Subject of (Sexual) | 1 | 2.12 | 1.47 |
| Flat Chest Body | 1 | 2.09 | 1.45 |
| Brother Complex Personality | 1 | 2.06 | 1.43 |
| Cross Necklace Clothes | 1 | 2.05 | 1.42 |
| Cyan Hair | 1 | 2.03 | 1.41 |
| Furry Tail Body | 1 | 2.03 | 1.40 |
| Virgin Sex Engages in (Sexual) | 4 | 0.85 | 1.37 |
| Gang Rape Subject of (Sexual) | 1 | 1.89 | 1.31 |
| Ribbon Hair Tie Clothes | 2 | 1.19 | 1.31 |
| Braid Hair | 1 | 1.78 | 1.23 |
| Sword Items | 1 | 1.77 | 1.23 |
| Necktie Clothes | 2 | 1.12 | 1.23 |
| Short Shorts Clothes | 1 | 1.75 | 1.21 |
| Older Brother Role | 1 | 1.73 | 1.20 |
| Quickie Fix Subject of (Sexual) | 2 | 1.08 | 1.19 |
| Doggy Style Engages in (Sexual) | 1 | 1.68 | 1.17 |
| Boots Clothes | 1 | 1.68 | 1.16 |
| Small Breasts Body | 1 | 1.66 | 1.15 |
| Olive Body | 1 | 1.66 | 1.15 |
| Violet Eyes | 2 | 1.05 | 1.15 |
| Wealthy Role | 1 | 1.65 | 1.15 |
| Thigh-high Stockings Clothes | 2 | 1.04 | 1.15 |
| No Bangs Hair | 1 | 1.65 | 1.14 |
| Mini-dress Clothes | 1 | 1.63 | 1.13 |
| Waist Length+ Hair | 3 | 0.81 | 1.12 |
| Garter Belt Stockings Clothes | 1 | 1.62 | 1.12 |
| Blue Eyes | 3 | 0.80 | 1.11 |
| Mole Body | 1 | 1.58 | 1.10 |
| Teacher Role | 1 | 1.56 | 1.08 |
| Cowgirl Subject of (Sexual) | 2 | 0.95 | 1.05 |
| School Uniform Clothes | 3 | 0.75 | 1.05 |
| Seventh Posture Subject of (Sexual) | 1 | 1.46 | 1.01 |
| Daughter Role | 1 | 1.45 | 1.01 |
| Shoulder-length Hair | 2 | 0.92 | 1.01 |
| Headband Clothes | 1 | 1.45 | 1.01 |
| Brown Eyes | 2 | 0.90 | 0.99 |
| Pantyhose Clothes | 1 | 1.42 | 0.99 |
| Cooking Engages in | 1 | 1.42 | 0.98 |
| Gloves Clothes | 1 | 1.41 | 0.98 |
| Masturbation Engages in (Sexual) | 1 | 1.39 | 0.97 |
| Bathroom Sex Engages in (Sexual) | 1 | 1.39 | 0.96 |
| Grey Hair | 1 | 1.38 | 0.96 |
| Kid Body | 1 | 1.37 | 0.95 |
| Bukkake Subject of (Sexual) | 1 | 1.35 | 0.93 |
| Red Hair | 1 | 1.32 | 0.92 |
| Fighting Engages in | 1 | 1.29 | 0.89 |
| Sixty-nine Engages in (Sexual) | 1 | 1.26 | 0.87 |
| Teen Body | 3 | 0.62 | 0.86 |
| Blue Hair | 1 | 1.19 | 0.83 |
| Butterfly Subject of (Sexual) | 1 | 1.17 | 0.81 |
| Twin Tails Hair | 1 | 1.13 | 0.78 |
| Missionary Subject of (Sexual) | 1 | 1.12 | 0.77 |
| Glasses Clothes | 1 | 1.08 | 0.75 |
| Vaginal Fingering Subject of (Sexual) | 1 | 1.08 | 0.75 |
| Boobjob Engages in (Sexual) | 1 | 1.07 | 0.74 |
| Miniskirt Clothes | 1 | 1.06 | 0.74 |
| Doggy Style Subject of (Sexual) | 1 | 0.92 | 0.64 |
| Blond Hair | 1 | 0.89 | 0.62 |
| Pale Body | 4 | 0.37 | 0.59 |
| Black Hair | 1 | 0.80 | 0.56 |
| Blowjob Engages in (Sexual) | 1 | 0.76 | 0.53 |
| Young-adult Body | 1 | 0.76 | 0.53 |
| Brown Hair | 1 | 0.68 | 0.47 |
| Slim Body | 1 | 0.58 | 0.40 |