This is a story of friendship, respect, and love between the sniper duo of Class 3-E, Chiba Ryuunosuke and Hayami Rinka, beginning the start of the assassination classroom until their graduation in junior high.

Chiba Ryuunosuke and Hayami Rinka are officially part of the society. As working adults, they discovered that being together like before won't be possible unless they take the next step. Till death do them apart... is it? [WARNING: Some parts of this book have mature and explicit content. Please proceed with caution.]

[Book 2 of Being Together Forever] The Class 3-E's top snipers are now high school students. Then, they enter college. Going to different schools, what challenges and developments are in store for them?

[Book 1 of Being Together Forever] This is a story of friendship, respect, and love between the sniper duo of Class 3-E, Chiba Ryuunosuke and Hayami Rinka, beginning the start of the assassination classroom until their graduation in junior high.