Whee, a game I worked on is being released! 9-nine- is a pretty fun series, with a little bit of everything: mystery, chuuni action, and romance. The heroine for volume 1 is super sweet and super cute, too. Check it out on Steam: https://store.steampowered.com/app/976390/9nineEpisode_1/. 18+ is gonna be on Denpasoft (probably up soon?)
VNDB page is here: https://vndb.org/v19829
Give it a shot!
Mm. Sorry it's not to your taste, but she uses unique-to-her, made-up nicknames for her brother, so when she does that, we localized them. That particular line has her call him "nii-yan", for example. Translating them helps her come off as quirky in English, the way she comes off as quirky in Japanese. If it's any consolation, literally every time she uses everybody's favorite actual word, "onii-chan", it's just transliterated as "onii-chan".
Nicknames are still the weirdest hill for VN fan