[Requests Accepted] [OCTET SOFT] 姉鬼島 [RJ263866]

The R18 RPG production circle "OCTET SOFT" presents a story of love, suspense, and twisted sexuality set on a remote island in modern Japan. On that island, there are taboos that must not be touched, hells that must not be uncovered, and a future that must be grasped... Adult-oriented sister-themed RPG — "Sister Demon Island" △ This work includes the following situations and fetishes △ - Sister fetish - Cute boys - Reverse NTR - Reverse rape - Masturbation - Ejaculation control △ Other recommended points include △ - Tropical, remote island, traditional themes - Mystery-solving elements - Carefully crafted sound effects (some field recordings!) - Original game music (luxurious compositions!) - A handmade feel to the interface - Battle system reminiscent of classic FC-style RPGs - A game focused on developing a weak protagonist Now, let’s embark on a journey to this maddening "island erased from the map of Japan"! ◆ Synopsis ◆ The protagonist, Chihiro Ogasawara, was abandoned by her parents and raised in a children's care facility. For many years, she had a crush on a girl she admired, Hikaru Hinata, the only daughter of the facility's director. Hikaru always helped Chihiro, who was physically and mentally weak and frequently bullied, watching over her like a real sister. As time passed, Chihiro turned 18 and had to leave the facility, but she couldn't find a job or a place to live and felt lost. Seeing this, Hikaru invited Chihiro to come live with her in her own apartment. Living together with her beloved sister Hikaru! Chihiro's long-held feelings of love soared, but as they started living together, it became a disappointing cohabitation far from a romantic relationship, leaving her feeling increasingly downcast. One day, Chihiro accidentally showed Hikaru a travel brochure that had been delivered to their mailbox. Although they weren't even a couple yet, Hikaru agreed to participate in a travel plan called the "Couple Challenge Tour" with Chihiro! Will Chihiro be able to successfully become romantically involved with her beloved sister Hikaru on their trip to the southern island? However! The name of the remote island they are heading to is "Sister Demon Island" — at that moment, Chihiro had no idea that a cruel, bizarre, and maddening fate of love and sexuality awaited them... ◆ Main Development Staff ◆ Illustration: shirowa https://twitter.com/shirowa3 Music: Kozo Tomiya (Tomiya Workshop) https://twitter.com/kozo_fukaya Main Dot Works: Marumugi Koji https://twitter.com/marumugi4510 Title Logo Design: Nikujaga Prince https://twitter.com/nikujyagaouji Director: Oct ◆ Trial version now available ◆ In the trial version, you can play from the beginning of the game until the second night of your stay on the island. You can carry over the data from the trial version to continue in the full version. If you reach a BAD END in the trial version, the story will continue in the full version from that point. *Please note that settings and texts in the trial version may change in the full version. *Since there are many environmental sounds used, it is recommended to play with headphones or earphones. ◆ ver1.10 Update ◆ For details on the update content, please check the following OCTET SOFT Ci-en article. https://ci-en.dlsite.com/creator/3124/article/416815