チーパオユウカグッズのあの滲み出るエロスは何なのか。
その謎を解明すべく先生はツチノコ調査へと向かった───

What exactly is that palpable eroticism radiating from the Cheongsam Yuuka merchandise?
To unravel this mystery, Sensei set off to investigate the Tsuchinoko...