chapter 1:Basically omegaverse... except the alpha is an actual wolf... and the uke turned into an 'omega' by eating sour plums.. Be careful what you eat kids
Chapter 2: first time I even heard about a chastity belt for guys O_O lil bro, you're lucky that your nii-san is so kind (and stupid)
Chapter 4: awwwww <3
Ookami-san to Eroi koto