In a big city in the desert called Valcia, only young people called 'adept' are allowed to go out. The city used to be covered with a canopy, but people can see the sky and a lot of people visit the city through the canopy now. But this inflow of people gradually changes the city... Young people called "adept" are the ones who search into various ruined labyrinths full of treasures and danger, and fight against monsters called 'horror'. Recently, these monsters called 'horror'", which are supposed to exist only in the labyrinths, started to appear in the city. People are now afraid of the change of the city and the monsters. One night; a boy sees something shiny, another boy learns what to love, a girl finds the meaning of the starry sky, and an assassin sheds a tear of remorse... [Edited from ErogeShop]

The year is 1908. The 20th century is still young. An unfamiliar 20th century - in an unfamiliar world. This is a world that experienced a 19th century very different from our own. A world filled with innumerable steam-powered "Engines." The unnaturally rapid development of this steam civilization has left the world's skies shrouded in grey... and its seas dyed black. "Sea" - Once, the word suggested an expanse of blue. Today, it refers to something dark and putrid. The former harbor city of Marseille in the European Kingdom of France looks out on a sea as black as any other. But these particular waters are home to something that can't be found anywhere else on Earth... A massive artificial island, solid and imposing as a fortress. A city in its own right, but also a school; a place bursting with life and color. Its formal name: The Marseille Offshore Academia. In the spring of 1908... A single young man appears within its walls. After declaring his intent to wage war against its powerful Governing Council, he introduces himself in this way: "Nikola Tesla. 72 years old. I'm a transfer student." "Students of the Marseille Offshore Academia. My hundred thousand young friends, cursed by fate." "...I will save every last one of you with my own two hands." And at the summit of Château d'If, a bell rings out. The Bell of Gahkthun, announcing that the time of rejoicing is at hand...

A fandisc which covers Liar-soft's What a Beautiful/Steampunk series, featuring a total of nine scenarios with seven being newly written. Also includes a teaser PV for the sixth installment of the series, Ourai no Gahkthun.

■■『紫影のソナーニル 補章 月のない夜に』 ごきげんよう、ライアーソフトです。 BugBugさま200号記念という祝事にあたり、弊社新作『紫影のソナーニル』補章が華やぎのひとつとなれば幸いです。 もしも弊社作品に触れるのが初めてという方は、こんなメーカーも世の中にはあって、BugBugさまの隆盛を喜んでもいる、ということを憶えておいていただければ幸いです。 弊社のファンでいらっしゃる方には、どうか、書き下ろし＆描き下ろし＆録り下ろしの外伝をお楽しみいただければ、幸いです。 それではどうか、よい旅を。 （ライアーソフト開発部：桜井光）