Not going to go through all the comments to see if anyone else realized
the 20cm/2 in the title probably refers to Yachiru-san taking up so much space, there's only 20 cubic centimetres left for Seiichiro
though it should be 20cm^2, rather than 20cm/2
So cute
and as Grandma said
even if they don't end up together, being friends is still nice
It felt like she's encouraging her, but also telling her it's up to her to decide in the end
Well said
I don't think it's about "buying" the relationship, the MC is in a way a link to her past childhood, a sort of "normalcy", and she is afraid of losing it
Bit late to the party, but I really love the detail of Kei no longer feeling love or hatred for humans, it's just indifference
Which was, obviously, stated in the previous episodes on the clock, the opposite of love isn't hatred, but indifference