Stories with themes of shinju

I had no idea what shinju is so I googled it, idk if that's what you meant but it came up as meaning a double suicide?? So here are some GLs with a double suicide pact:

https://www.mangago.me/read-manga/chirizokonai_no_hiraeth/
https://www.mangago.me/read-manga/my_blue_garnet/
https://www.mangago.me/read-manga/nekomedou_kokoro_tan/ (chapter 1 only)
https://www.mangago.me/read-manga/kitanai_kimi_ga_ichiban_kawaii/ (toxic relationship, features some extreme fetishes such as age regression/babyplay, vomit kink, period blood kink, etc.)

https://www.mangago.me/read-manga/haruka_tooki_ie/

Yes! It means double suicide, it’s popular in Japanese classic literature as like a lovers suicide but I haven’t seen it in manga before
Thank you for the recs !