Responses
https://www.mangago.zone/read-manga/doppleganger/ didn't ended up killing himself
https://www.mangago.zone/read-manga/a_trace_of_the_wonder/ suicide thoughts
https://www.mangago.zone/read-manga/raising_a_bat/
Attempted, but got saved last minute
https://www.mangago.zone/read-manga/haruka_tooki_ie/
its short but so tragic
manhwa/hua/ga where the mc kills themselves? suicide and death whatever