Kousuke lives with his mother, Sakiko, and younger sister, Izumi, peacefully. But Izumi starts to withdraw at home, and they decide to move to another city. There are girls he knows at school where they transfer, Natsuki and Yuka, whom Kousuke met at the beach of his hometown last summer. But Natsuki seems to hate Kousuke. He doesn't know why, and can't understand her. One day, he receives an email from "Anonymous" saying, "I know your secret." He doesn't know what it is, but the email comes to his cell phone every day. It seems the sender enjoys seeing him being confused. He thinks something happened during the summer when he met them. He starts to investigate what happened on that day, even though he has a bad premonition... [From Himeya Shop]
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| Name | Score | Importance | Weight |
|---|---|---|---|
| High Amount of Special Effects | 3.00 | 2.21 | 6.63 |
| Psychological Horror | 3.00 | 2.10 | 6.29 |
| Depression | 3.00 | 1.97 | 5.91 |
| Blackmail | 2.75 | 1.76 | 4.84 |
| Unavoidable Rape | 2.50 | 1.86 | 4.64 |
| Protagonist's Sister as a Support Character | 2.00 | 2.09 | 4.18 |
| Mystery | 3.00 | 1.31 | 3.93 |
| Student Protagonist | 3.00 | 1.26 | 3.77 |
| Lip Sync | 2.00 | 1.83 | 3.66 |
| Netorare | 2.40 | 1.51 | 3.63 |
| Mother Support Character | 2.00 | 1.78 | 3.56 |
| Modern Day | 2.00 | 1.57 | 3.15 |
| Heroine Having Sex with Others | 2.00 | 1.52 | 3.05 |
| Bad Ending(s) | 2.50 | 1.20 | 2.99 |
| Group Sex of One Female and Several Males | 2.67 | 1.08 | 2.88 |
| Photographic Backgrounds | 2.00 | 1.39 | 2.79 |
| Branching Plot | 2.00 | 1.30 | 2.60 |
| Other Perspectives | 2.00 | 1.14 | 2.27 |
| Student Heroine | 2.00 | 0.99 | 1.98 |
| High School Student Heroine | 2.00 | 0.85 | 1.70 |
| Brief NVL Scenes | 1.00 | 1.57 | 1.57 |
| Unlockable Routes | 1.00 | 1.49 | 1.49 |
| Horror | 1.00 | 1.44 | 1.44 |
| Rape | 1.00 | 1.23 | 1.23 |
| Male Protagonist | 3.00 | 0.30 | 0.91 |
| ADV | 1.00 | 0.15 | 0.15 |
| Name | Characters | Importance | Weight |
|---|---|---|---|
| Kendo Engages in | 2 | 2.57 | 2.83 |
| Anemia Subject of | 1 | 3.46 | 2.40 |
| Selfish Personality | 2 | 1.96 | 2.15 |
| Brown Eyes | 6 | 0.90 | 1.76 |
| Classmate Role | 3 | 1.23 | 1.70 |
| Younger Sister Role | 2 | 1.44 | 1.59 |
| Class President Role | 1 | 2.28 | 1.58 |
| Poor Role | 1 | 2.26 | 1.57 |
| Widow Role | 1 | 2.20 | 1.53 |
| High School Student Role | 5 | 0.85 | 1.52 |
| Odango Hair | 1 | 2.15 | 1.49 |
| Half-orphan Role | 1 | 2.11 | 1.46 |
| Gokkun Engages in (Sexual) | 1 | 2.04 | 1.41 |
| Transfer Student Role | 1 | 2.02 | 1.40 |
| Psychological Trauma Subject of | 1 | 2.02 | 1.40 |
| Childhood Friend Role | 2 | 1.26 | 1.38 |
| Amnesia Subject of | 1 | 1.95 | 1.35 |
| Immature Personality | 1 | 1.93 | 1.34 |
| Brown Hair | 6 | 0.68 | 1.33 |
| Beard Hair | 1 | 1.90 | 1.31 |
| Jealous Personality | 1 | 1.88 | 1.30 |
| Short (obsolete) Body | 1 | 1.86 | 1.29 |
| Boku Personality | 1 | 1.78 | 1.24 |
| Ponytail Hair | 2 | 1.10 | 1.21 |
| Older Brother Role | 1 | 1.73 | 1.20 |
| Protective Personality | 1 | 1.68 | 1.16 |
| No Bangs Hair | 1 | 1.66 | 1.15 |
| Wealthy Role | 1 | 1.65 | 1.15 |
| Grey Eyes | 1 | 1.60 | 1.11 |
| Older Sister Role | 1 | 1.56 | 1.08 |
| Necklace Clothes | 1 | 1.50 | 1.04 |
| Mother Role | 1 | 1.46 | 1.01 |
| Daughter Role | 1 | 1.46 | 1.01 |
| Adult Body | 1 | 1.35 | 0.93 |
| Black Hair | 2 | 0.81 | 0.88 |
| Sex in Public Places Engages in (Sexual) | 1 | 1.26 | 0.87 |
| Short Hair | 3 | 0.61 | 0.84 |
| Ribbon Hair Tie Clothes | 1 | 1.19 | 0.83 |
| Twin Tails Hair | 1 | 1.13 | 0.78 |
| Waist Length+ Hair | 1 | 0.81 | 0.56 |