Erika is a 16 year-old high-school student who receives lots of love letters from other girl students. One night space tax collector Seri lands on Erika killing her. In order to regain the body Erika needs to help Seri save the world in the next 500 hours by participating in various interstellar sex events. [From vndbreview]
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X -Ekkusu- has not yet been read by enough users to calculate it's similar novels... sorry!
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X -Ekkusu- 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 |
|---|---|---|---|
| Catgirl Heroine | 3.00 | 1.93 | 5.80 |
| Colored Texts | 3.00 | 1.66 | 4.99 |
| Girl x Girl Romance Only | 3.00 | 1.61 | 4.82 |
| Space | 2.00 | 2.28 | 4.56 |
| Bestiality | 2.00 | 1.83 | 3.66 |
| Scenario Selection | 2.00 | 1.81 | 3.63 |
| Lesbian Sex | 3.00 | 1.15 | 3.45 |
| Pissing | 2.00 | 1.44 | 2.88 |
| Kinetic Novel | 2.50 | 1.07 | 2.67 |
| High Sexual Content | 2.50 | 1.05 | 2.63 |
| High School Student Heroine | 3.00 | 0.85 | 2.54 |
| Suction on Nipples | 1.00 | 2.24 | 2.24 |
| Futanari on Female | 1.00 | 2.06 | 2.06 |
| Protagonist with a Face | 3.00 | 0.63 | 1.90 |
| Girl x Girl Romance | 1.00 | 1.61 | 1.61 |
| Anal Fingering | 1.00 | 1.48 | 1.48 |
| Female Protagonist | 2.00 | 0.71 | 1.42 |
| Sex in Water | 1.00 | 1.41 | 1.41 |
| Vaginal Masturbation | 1.00 | 1.36 | 1.36 |
| Nukige | 2.00 | 0.65 | 1.30 |
| Colored Name-tags | 1.00 | 1.22 | 1.22 |
| Loli Heroine | 1.00 | 1.19 | 1.19 |
| Vibrators | 1.00 | 1.15 | 1.15 |
| Sexual Content | 1.50 | 0.63 | 0.95 |
| ADV | 2.50 | 0.14 | 0.36 |