The problem isn't with the timeskip. For example look at Kakeochi Girl. One can use timeskips if they know how. The author definitely didn't know shite about timeskips hence the disaster of an ending.
well, at least the teacher is distinguishable unlike 98% of other characters in this manga. It took 60 chapters for the author to understand that if you can't draw different faces you can try different hairstyles.
Aya had it coming. Hope her stupid ass will get dumped the worst way possible. At first I thought Sei was the most irritating character in this manga but no... I just can't stand the sheer stupidity.