Best yuri I read this year, hands down, lmao! I like how the niece went from let-us-study to seeing a shocking sight to sex mode in about 2 seconds flat. Does not waste time, I approve! Also, that is some tongue she has~
._.
w-what
Also Mana must have helluva age gap with her older sibling.
I have 20 years age gap with my olders sisters t(ツ)_/¯
Biggest age gap between siblings in my family is 24 years. Ironically, the older of the two has a son who is "mere" 9 years younger than his aunt. It is not that unusual in real life, but it somewhat is in manga, where siblings are usually closer in age. The plot here was just too fast-paced to allow time for familial circumstances to be properly presented.