The World Without My Sister Whom Everyone Loved - Ch. 30

[MangaDex]

 

[ClueByFour]

Ah yes, I too started my first day of basic education with fourier transforms. Perfectly logical.

 

[odragonoo]

Wait wait wait wait... They're teaching an 11-year-old CALCULUS??? I mean they are talking about terraformers but the black board is clearly full of calculus.