"Gokko" means playing a game of make-believe.
One day, a boy called Ikei comes to Fuyuko's place and claims to be her brother. She doesn't believe him, however she allows him to stay at her house. As a wannabe future actress she then starts playing "Gokko" with him to improve her acting skills. Where will it lead them?
(taken from Wataame Shoujo)
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