Watch full Chocotto Sister Episode 21 English Subbed online for free in HD. Full HD Chocotto Sister Episode 21 English sub streaming online. Let’s (Go to the) Amusement Park!. Choko is still sad after Kuro’s death and in order to liven her up, Haruma, along with Chitose and Makoto, take her to the amusement park. Choko meets a girl who says she has lost her mom, and spends the day seeking for her. What she does not know is that the girl and her mother are Mr. Yasuoka’s daughter and wife, long since dead.