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

Alt Names: ????????????????? (Pre-Serialization) | I Don't Know What My Little Sister's Friend Is Thinking (Pre-Serialization) | ???? ???? ??? ?? ???? ???? ??? ?? ????? ???? ??? ??? ??! (Pre-Serialization) | Tôi ch?ng hi?u cô b?n c?a em gái tôi ?ang ngh? gì! (Pre-Serialization)

Romance Comedy Web Comic Slice of Life

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Synopsis

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…

**Note:** Translated by [Baby One More Time](https://mangadex.org/group/8518/baby-one-more-time) with the permission of the author.
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**Alt Official Raw:** [Defunct Twitter Moment](https://twitter.com/i/events/1159872513876250625)

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

Synopsis

Chapters 21

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