It's 君としあわせな最期. It is a Hanako/Nene doujinshi. The artist was Merry-passing(https://www.pixiv.net/en/users/39132928)

It's Shorelines and Sandcastles:A rikai fanzine

It's 先生と生徒。これからも、この先も。It is a Hanako/Nene doujinshi. The artist was hanabc(https://to17.booth.pm/)

©repth