Mahou Shoujo☆Karimenkyo

A girl bursts into Kazuki Takaki's room, pulls out an odd stick, and shouts a transformation phrase. Before his eyes, she is engulfed in light, briefly revealing a silhouette in a state of undress, and transforms into a magical girl. This marks the start of Kazuki's bizarre experiences. As an enigmatic barrier begins to spread across the town, Kazuki faces a crucial decision.