If you're looking for manga similar to Miyakawa-ke no Kuufuku (Light Novel), you might like these titles.
A self-proclaimed unattractive gloomy high schooler, Hiramiya Reiji, everytime he goes to visit his close friend’s house, he gets messed around by his older sister, Sakuya. Drinking his drink as she pleases, barging into the bathroom, and crawling under his blanket in the middle of the night… Thinking that perhaps he has done something to make her dislike him, he asked his close friend whether he has any idea, but he only gets a reply in a incomprehensible way, “you still haven’t noticed it, huh” On a certain day, Reiji loses in a game and has to listen to 3 of Sakuya’s wishes. Reiji goes along with it even though he has doubts, but could he gradually begin to understand Sakuya’s true feelings…? This is the story of super dense youth and a can’t-be-honest older sister until they become a lovey-dovey married couple――
In this book of Spy x Family original prose stories, Anya attempts to make friends with her target Damian during an Eden Academy camping trip, Yuri spends his day off babysitting his niece, and Franky seeks Loid’s help in winning the heart of a blind opera singer. Then, when the family sits for a portrait painting, Yor is terrified that her secret identity will be blown. And in the final story, the family is scrutinized by a pair of unseen observers... There’s never been a family quite like this one!
After saying "I wanna go somewhere far away..." in front of Hakase, Yukko and friends are flung into the far reaches of space. They encounter a planet where anything you say becomes real, and enjoy themselves to their hearts' content. But at the same time, Tokisadame City is faced with a fearsome threat?!