I Don't Know What My Little Sister's Friend Is Thinking! (Pre-serialization)

Chie-chan has a deadpan friend, Tsuyu-chan, and Chie's older brother has no idea what she is thinking. Only thing he knows is that she's paying him a lot of attention, glaring at him and avoiding him…

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Twitter series, translated by [Baby One More Time](https://mangadex.org/group/8518/baby-one-more-time) with permission of the author.