That thing you mention between Zinnia and Grisselette must have been a failure of mine when programming.
The second thing, I am sorry, but did not understand. Could you say it again?
Third, some girl stories actually made connection with the main story. For instance, Miwa's Affectionate Event 2! (I am not saying what, bc it would be spoiler.)
Thank you for your excellent feedback, pal! I would take all your comments into account and try to improve on future versions!