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Summary

My first kiss was with my younger sister.... I thought about our relationship after we kissed.... However, she told me with tears of joy in her eyes, "Well, it's our secret, right?" Like this, our new relationship begins.... "There'll be no problem if we just keep them secret!" [Edited from Himeya Shop]

Naisho Shishunki ~Himitsu ni Koi Suru Imouto-tachi~ 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.

Naisho Shishunki ~Himitsu ni Koi Suru Imouto-tachi~ has not yet been read by enough users to calculate it's similar novels... sorry!
A novel needs atleast 20 votes before it's similarity is calculated.

Naisho Shishunki ~Himitsu ni Koi Suru Imouto-tachi~ 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.

Tags (20 total)

NameScoreImportanceWeight
Protagonist's Sister-in-Law as a Heroine2.002.384.76
Tribadism on Penis2.001.873.74
School Life Comedy2.001.843.69
Brocon Heroine2.001.613.22
Fingering2.001.533.07
Handjob2.001.513.03
Perverted Heroine2.001.412.82
Reverse Cowgirl2.001.332.66
Female Ejaculation2.001.272.55
High School2.001.222.44
Blowjob2.001.122.25
Standing Sex2.001.062.11
High Sexual Content2.001.052.11
Cunnilingus2.000.931.86
High School Student Heroine2.000.851.69
Cowgirl2.000.841.68
Doggy Style2.000.811.61
Defloration2.000.761.52
Male Protagonist2.000.300.60
2.000.000.00

Traits (116 total)

NameCharactersImportanceWeight
Sports Uniform Clothes32.102.91
Sport Bloomers Clothes41.722.76
Tennis Engages in22.492.73
Discreet Sex Engages in (Sexual)31.852.57
Group Sex Engages in (Sexual)41.522.45
Non-blood-related Incest Engages in (Sexual)22.152.37
Veil Clothes22.152.36
Tribadism on Penis Engages in (Sexual)22.082.28
Kouhai Role31.632.26
Wristband Clothes22.002.20
Bukkake Subject of (Sexual)41.352.17
Sex at School Engages in (Sexual)31.552.15
Cardigan Clothes21.872.06
Library Committee Member Role12.922.03
Parted in Middle Hair41.252.01
Standing Sex Subject of (Sexual)41.181.89
Shirt Clothes41.161.86
Outdoor Sex Engages in (Sexual)41.161.86
Umbrella Items12.651.84
Garnet Eyes21.661.83
Hair Loopies Hair12.531.75
Puffy Personality12.521.74
Jeans Clothes21.551.71
Habit Clothes12.401.66
Non-blood-related Brother Role12.381.65
Principal Role12.361.64
Mirror Sex Engages in (Sexual)12.311.60
Twin Blowjob Engages in (Sexual)21.451.59
Womanizer Personality12.281.58
Leggings Clothes12.271.57
Bag Items12.261.57
Hair Tie Clothes21.411.55
Wings Body12.231.55
Cowgirl Subject of (Sexual)40.951.54
High School Student Role50.851.53
Knee-high Socks Clothes21.381.52
Non-blood-related Sister Role12.171.50
Closet Pervert Personality12.161.50
Boobs on Glass Subject of (Sexual)12.151.49
Boobjob Engages in (Sexual)31.071.48
Book Items12.121.47
Hidden Vibrator Subject of (Sexual)12.121.47
Third Person Personality12.111.47
Court Shoes Clothes12.101.46
Brother Complex Personality12.061.43
Cross Necklace Clothes12.051.42
Small Breast Sizes Body12.011.39
Sunglasses Clothes12.001.39
Sex in Public Places Engages in (Sexual)21.261.38
Virgin Sex Engages in (Sexual)40.851.37
School Uniform Clothes50.761.36
Immature Personality11.931.34
Airhead Personality11.921.33
Low Self-esteem Personality11.901.31
Blue Hair21.191.31
Ribbon Hair Tie Clothes21.191.31
Doggy Style Subject of (Sexual)30.921.28
Handjob Engages in (Sexual)21.161.27
Strict Personality11.831.27
Twin Tails Hair21.131.24
Pajamas Clothes11.751.21
Skirt Suit Clothes11.741.21
Teen Body60.621.20
Older Brother Role11.731.20
Quickie Fix Subject of (Sexual)21.081.19
Reserved Personality11.711.19
Nipple Sucking Engages in (Sexual)11.701.18
Shorts Clothes11.681.16
Spoons Subject of (Sexual)11.671.16
Thigh-high Stockings Clothes21.041.15
Pervert Personality11.631.13
Short Hair50.611.09
Teacher Role11.561.08
Energetic Personality11.521.05
Pendant Necklace Clothes11.521.05
Orange Hair11.511.05
Green Hair11.481.03
Blouse Clothes11.461.01
Seventh Posture Subject of (Sexual)11.461.01
Younger Sister Role11.451.00
Brown Eyes20.900.99
Pantyhose Clothes11.430.99
V Bangs Hair11.410.98
Masturbation Engages in (Sexual)11.400.97
Bathroom Sex Engages in (Sexual)11.390.96
Nipple Sucking Subject of (Sexual)11.380.96
Kid Body11.370.95
Hosome Eyes11.370.95
Brown Hair30.680.95
Tominagi Subject of (Sexual)11.360.94
Adult Body11.340.93
Skirt Clothes11.340.93
Ahoge Hair11.320.92
T-shirt Clothes11.310.91
Waist Length+ Hair20.810.89
Blue Eyes20.800.88
Belt Clothes11.270.88
Classmate Role11.230.85
Friendly Personality11.220.84
Blowjob Engages in (Sexual)20.760.84
Anal Sex Subject of (Sexual)11.190.82
Pale Body80.370.81
Missionary Subject of (Sexual)11.120.77
Ponytail Hair11.100.76
Glasses Clothes11.080.75
Vaginal Fingering Subject of (Sexual)11.080.75
Miniskirt Clothes11.060.74
Sitting Sex Subject of (Sexual)11.060.74
Parted to Side Hair11.050.73
Violet Eyes11.050.73
Spiky Bangs Hair11.000.69
Sidehair Hair10.980.68
Blond Hair10.890.62
Long Hair10.750.52
40.000.00
10.000.00