Anpanman finds an odd little girl from outer space. The girl turns out to be Kokin-chan, Dokin-chan's younger sister who came to Earth to play. Moreover, Kokin-chan is a master of fake crying and exploits her skill to get out of the trouble she causes. And her tears have the special power to make anyone whose eyes are touched by them cry without reason.

人気アニメ「それいけ!アンパンマン」の劇場版第18作「~いのちの星のドーリィ」の同時上映作品。ある日、空から突然落ちてきたたまご。パトロール中のアンパンマンが慌てて受け止めると、中からコキンちゃんという小さな女の子が現れる。