The love festival has its merits for it prove to the duo where there are lacking and it actually lead to Nizuma realising that even he has a few blind spot.
Personally, I don't think that what Nanamine did is wrong. He didn't plagiarize the work- he absorbs the elements and essence of others and make it his own by adding his own style along. If you think about it every manga artist and editor is in their way doing what Nanamine is doing and from a...