My Transparent Paper-Doll Boyfriend

[2020.8.22] A card sits on the transparent interface, three gold letters stamped along its top edge. It's a rare SSR, with an official drop rate of just 0.00001%. Yet there's no character or skill description on it. The blank card shows only a metal chain and a number standing in for a name. K29 [Loading K29's prelude story.] The abnormalities began after Lin Xianbai was assigned to the K29 observation room. The back of his neck often felt cold. A rough object rubbed against his chin, and sometimes the corner of his mouth felt damp. It was as if someone he couldn't see had appeared beside him. Someone invisible who was always taking liberties with him. [Choose K29 as your target for the next stage?] Lin Xianbai selected