From hit Japanese ending developer Lusterise! To investigate her mysteriously missing sister, Yuri sets out with Souma to a rumored island—only to discover Kaede Amakubo, who has no memories but looks exactly like her sister.

<h2 class="bb_tag" >GAMEPLAY &amp; FEATURES </h2><ul class="bb_ul"><li>Single-ending visual novel with 20 minutes till credits<h2 class="bb_tag" >STORY </h2>Strange news reaches the ears of Yuri Amakubo, the scientist behind the ExS-TIA system.<br>On a remote island in the middle of nowhere was a woman who was the spitting image of her older sister Kaede. To uncover the truth, Yuri immediately heads to the island with Souma. <br>There, they find Kaede—who remembers her name, but has lost all other memories. Surprisingly, she and Yuri possess identical pendants... <br>Could this be the key to unlocking her past?<h2 class="bb_tag" >CHARACTER </h2><br><strong>Yuri Amakubo</strong><br><span class="bb_img_ctn"><img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3508150/extras/2931ccbb63d20160945881ba479695cd.avif?t=1777337854" width=616 height=230 /></span><br>The female scientist behind the ExS-TIA system.  Possesses a keen instinct.<br><br><strong>Kaede Amakubo</strong><br><span class="bb_img_ctn"><img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3508150/extras/f332be6bc6530ef41cdbcb7988113627.avif?t=1777337854" width=616 height=230 /></span><br>Yuri’s older sister. A sophisticated woman in contrast to Yuri. Her whereabouts have long been a mystery.</li></ul>

Good Game Database

Holy Valkyrie ExS-TIA F

About this game

GAMEPLAY & FEATURES

STORY

CHARACTER

Developer

Lusterise

Publisher

Shiravune

Release Date

20 May, 2026

Platforms