the girl from random chatting! joonwoo hates the school and finds it difficult to make friends. the only moment he's comfortable is when he's in the random chatting phone app talking to strangers. that's how joonwoo ends up friendly with a girl on ranchat who turns out to be his classmate sungah but she doesn't have any idea! will joonwoo be able to overcome his social anxiety in real life and get closer to her?