The manga producer is clearly making all the girls, one by one, lose their mind and hallucinate. Like when i saw "Ruu is a lie" i was like NO WAY and when i reread it several times and looked at the panels carefully.....She did look like the bear and if the infection started months or weeks ago then ruu should of had died of starvation if she just hid like that the whole time........so thats my theory even if i hate to admit that such a cute girl died....... （−＿−；）So, I'm just gonna conclude that Ruu is now MINI MEGU-NEE FEATURING RII-SANS IMOUTO-CHAN!!!!