Could you guys recommend any manga/manhwa/light novels that have the same kind of vibe like Silver Diamond/The Reader and the Protagonist Definitely Have to Be In Love/Scum Villain's Self-Saving System/Quickly Wear the Devil Face? You know, the protagonist help the male lead in his most time of need/the ultimate downfall when no one help him and then when the disaster overcame, the male lead possessively fall in love w the protagonist? Yaoi is preferable but I'm down with anything. But Yuri/Tragedy is a no-no please! Thank you so much in advance!

Have you tried reading other works from Sugiura Shiho-sensei?
Like Koori no Mamono no Monogatari and Shuuten Unknown?
I think Koori fits your description, and although Shuuten Unknown isn't like that I will still recommend this one.

And it will be helpful if you have a public list of your currently reading / completed manga so people can recommend you a new title.