I’m a sucker for volume 3’s playful and volume 5’s genius but volume 6’s ghost I think had the most well written dynamic with the “delinquent” (aside from the historic volume 1’s childhood friend+forgotten). Volume 7’s childhood rival is good but doesn’t fit this style of manga in the slightest. Volume 8-10 is fine but commits the crime of being too long, unless a harem, the
routes
should have had half of one volume be tom boy and half of the same volume be inventor... dedicating 8 entirely to the buildup is affine though. I’m surprised how many people like volume 4 and I’m surprised how many people are indifferent in both directions to volume 2.