Series: Oneesan and yukkuri 11 (boshiherondasu)

https://www.pixiv.net/member_illust.php?mode=medium&illust_id=66320816

A delusional, shithead pet reimu calls her owner a slave and gets promptly abandoned. She slowly realizes the situation she is in. Her attempts to be taken in fails. A big-tiddy fem-anon (nice one not the angry one) explains reimu that her selfishness is the reason why she is in this situation. Story ends with predictable results.