双方の親への報告が一回で済む特殊事例
Source: https://twitter.com/Strangestone/status/1475286660024008704

これと対のやつでした。
https://twitter.com/Strangestone/status/1229178894890106881
Source: https://twitter.com/Strangestone/status/1475289142959697923

今週は『報告帰省義妹』
Source: https://twitter.com/Strangestone/status/1475300407144431616

A special case in which they only need to report to both their parents at once.
Source: https://twitter.com/Strangestone/status/1475286660024008704

It's a counterpart to "this":[/posts/3788169].
Source: https://twitter.com/Strangestone/status/1475289142959697923

This week's theme is "Little Stepsister Reporting on Coming Home".
Source: https://twitter.com/Strangestone/status/1475300407144431616