Souzou Nushi Nanode Motto Yasashiku Kitte Kudasai!

Tooru Jin is a mid-career employee who works for a game company. Although he is a veteran, he gradually loses his place at work, but one day he dies in an unfortunate accident. When Tooru noticed, he was reincarnated as a little girl in a game he once designed.

(Source: Natalie, translated)