Shiro no Koukoku Monogatari

Shiro no Koukoku Monogatari (白の皇国物語) is a light novel series written by Shirasawa Inui and illustrated by Maguchimo.

The novel series was adapted into a manga series by Fuji Ma-yu and published by AlphaPolis Web Manga.

Plot
Having lost his money, lover, and future, a man who has given up on everything finds himself reincarnated in the kingdom of Altodestenia. He, Lectival, has no memories prior to being saved by Meriela, the daughter of an aristocrat, and now finds himself rising up to save the kingdom in its current crisis.