Boku ga Otouto to Nakayoku Naru Houhouボクが弟と仲良くなる方法 ; The Way I Get Closer to My Little Brother

Haruki used to be close with his younger brother Yuuki when they were younger, but they've since drifted apart. Haruki wants to use the chance of being alone with Yuuki to get on better terms with him, leading him to discover Yuuki's particular tastes.