Ken has a beautiful mother and loves her very much. His father is gone away for the business. One day, Ken invites his best friend, Tomoya to his house and presents his mother. Ordinary daily life and action... However, a tragedy starts from here... [From DLsite English]
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Okaa-san no Himitsu 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 | Score | Importance | Weight |
|---|---|---|---|
| Netorare | 3.00 | 1.51 | 4.52 |
| Changeable Font | 2.00 | 1.75 | 3.50 |
| Reverse Missionary | 2.00 | 1.68 | 3.37 |
| Ejaculation Choice | 2.00 | 1.53 | 3.05 |
| Only a Single Heroine | 3.00 | 1.01 | 3.04 |
| Heroine Having Sex with Others | 2.00 | 1.51 | 3.03 |
| Only Adult Heroines | 2.00 | 1.48 | 2.95 |
| Married Heroine | 2.00 | 1.42 | 2.85 |
| Few Choices | 2.00 | 1.33 | 2.65 |
| Sounds of Copulation | 2.00 | 1.29 | 2.58 |
| Early Sexual Content | 2.00 | 1.23 | 2.45 |
| Nose Hook | 1.00 | 2.44 | 2.44 |
| Bathroom Sex | 2.00 | 1.19 | 2.37 |
| Group Sex of One Female and Several Males | 2.00 | 1.07 | 2.14 |
| High Sexual Content | 2.00 | 1.05 | 2.11 |
| Naked Sprites | 2.00 | 1.05 | 2.11 |
| Blood-related Mother/Son Incest | 1.00 | 1.84 | 1.84 |
| Double Handjob | 1.00 | 1.64 | 1.64 |
| Double Penetration (Group Sex) | 1.00 | 1.45 | 1.45 |
| Vaginal Masturbation | 1.00 | 1.36 | 1.36 |
| Reverse Cowgirl | 1.00 | 1.33 | 1.33 |
| Nukige | 2.00 | 0.65 | 1.30 |
| Multiple Penetration | 1.00 | 1.28 | 1.28 |
| Sexual Content | 2.00 | 0.63 | 1.26 |
| Bukkake | 1.00 | 1.20 | 1.20 |
| Anal Sex | 1.00 | 1.13 | 1.13 |
| Quickie Fix Position | 1.00 | 1.12 | 1.12 |
| Bondage | 1.00 | 1.11 | 1.11 |
| Sitting Sex | 1.00 | 1.06 | 1.06 |
| Single Blowjob | 1.00 | 0.95 | 0.95 |
| Cowgirl | 1.00 | 0.84 | 0.84 |
| Multiple Endings | 1.00 | 0.67 | 0.67 |
| ADV | 2.00 | 0.14 | 0.29 |
| Name | Characters | Importance | Weight |
|---|---|---|---|
| Nose Hook Subject of (Sexual) | 1 | 2.68 | 1.86 |
| Ring Clothes | 1 | 1.94 | 1.34 |
| Multiple Penetration Subject of (Sexual) | 1 | 1.88 | 1.30 |
| Infidelity Engages in | 1 | 1.80 | 1.25 |
| Teasing Subject of | 1 | 1.64 | 1.14 |
| Sweater Clothes | 1 | 1.63 | 1.13 |
| Reverse Cowgirl Subject of (Sexual) | 1 | 1.63 | 1.13 |
| Bondage Sex Subject of (Sexual) | 1 | 1.58 | 1.10 |
| Big Breast Sizes Body | 1 | 1.56 | 1.08 |
| Wife Role | 1 | 1.53 | 1.06 |
| Group Sex Engages in (Sexual) | 1 | 1.52 | 1.05 |
| Headband Clothes | 1 | 1.45 | 1.01 |
| Masturbation Engages in (Sexual) | 1 | 1.40 | 0.97 |
| Nipple Sucking Subject of (Sexual) | 1 | 1.38 | 0.96 |
| Ahegao Engages in (Sexual) | 1 | 1.32 | 0.92 |
| Curtained Hair | 1 | 1.30 | 0.90 |
| Butterfly Subject of (Sexual) | 1 | 1.17 | 0.81 |
| Handjob Engages in (Sexual) | 1 | 1.16 | 0.80 |
| Quickie Fix Subject of (Sexual) | 1 | 1.08 | 0.75 |
| Vaginal Fingering Subject of (Sexual) | 1 | 1.08 | 0.75 |
| Miniskirt Clothes | 1 | 1.06 | 0.74 |
| Sitting Sex Subject of (Sexual) | 1 | 1.06 | 0.74 |
| Parted to Side Hair | 1 | 1.05 | 0.73 |
| Cowgirl Subject of (Sexual) | 1 | 0.95 | 0.66 |
| Brown Eyes | 1 | 0.90 | 0.62 |
| Blowjob Engages in (Sexual) | 1 | 0.76 | 0.53 |
| Young-adult Body | 1 | 0.76 | 0.53 |
| Long Hair | 1 | 0.75 | 0.52 |
| Brown Hair | 1 | 0.68 | 0.47 |