CHRV-188 Boyne repulsion coefficient e = Speed ​​after collision / Speed ​​before collision ＞1 The r

It's hard and warm, so it's easy to hold in your mouth, right? Mogomogo...Would you like to touch it? Nani? ! Brother, don't be mean! Harunyan, I'm not being mean. I'm doing something that feels good! Instead of practicing the recorder all the time, let's have some fun with your brother's clicky recorder! Harunyan also prefers Kocchi's recorder, right? There are even two! Yeah, this recorder is better for me too!