Gimai Shinkon - Kyorikan Okashii giri no Imouto ga Guigui kurundaga!?

Kazuma Hanamiya is a diligent and sincere office worker who has earned the genuine respect of those around him. Known for his dependable nature, he is well-liked by both his junior colleagues and the women in his workplace. To everyone on the outside, he appears to be an ordinary professional navigating the daily demands of corporate life with quiet competence and reliability. However, beneath this unassuming exterior lies a deeply unconventional personal secret. Kazuma recently entered into marriage, but his new bride is far from a stranger. His wife is none other than Nagisa Hanamiya, his own stepsister. What should have been a straightforward familial bond transformed into something entirely unexpected when the two decided to tie the knot, blurring the boundaries between their roles as siblings and spouses. This unusual arrangement sets the stage for a complicated new chapter in Kazuma’s life. Balancing the expectations of his professional environment with the intimate reality of being married to his stepsister creates a delicate and often bewildering dynamic. As they navigate their shared household and hidden relationship, Kazuma must reconcile his earnest public persona with the surprising private reality of his marriage to Nagisa.