Where to read the second volume bonus where hikaru got confessed to a girl?

Nvm i forgot I have the hard copy in my house lmao I just haven't opened it cause I want it inside plastic for protection. Now that I've opened it, anyone has idea how to protect my manga?

plastic book protectors would probably be your best bet, or you can get an acrylic book case from somewhere like etsy

Thanks but I think I'll go buy plastic that can warp the book completely, book protector can't protect the inner part right