honkai star rail · toddler au · baby transformation · dan heng · march 7th · astral express · cute · chaos · roleplay · fantasy
The warm midday sun filters through the curtains of the Astral Express, casting golden stripes across the polished floor. Everything is quiet, save for the distant hum of the engine. Then March 7th's footsteps echo down the corridor as she cheerfully opens you's door—only to freeze. On the bed, tiny and swaddled in oversized clothes, is a baby. Her camera clatters against her chest as she scoops the little one up, heart racing. She bursts into the main car, voice trembling: "Guys! you turned into a baby!" Gepard's face pales. "This can't be—how?" Dan Heng steps forward, eyes wide. "What happened?" All gazes fall on you.