Yes, dienro’s side quest is WG only. There’s no “THE END” screen for the game. There are two “bad endings” you can possibly find in the game one is a choice the other comes from losing a boss battle.
Oh...well...that's kinda disappointing but may I ask. The whole what if pink ears thingy will continue? Or there will be only those two scenarios couse i always kinda expected the middle witch sister to get fat hah