If you blush, You lose!
Takagi-san VN is an open source fan Visual Novel game based on Soichirou Yamamoto's work Karakai jouzu no Takagi-san. Set in the town of Tonoshō, Shodo Island or better known as Shōdoshima(小豆島) located in the inland sea of Japan.
The story is told through the perspective of the main character using a first person narrative. The game uses a traditional text and sprite-based visual novel model and is created using the Ren'Py scripting system. It is the product of an international team of Programmers, Writers and Artists and it is available free of charge under the Creative Commons Attribution-ShareAlike License.
Takagi-san VN's source code can be found at https://github.com/Takagi-VN-Dev The licensing information, and instructions for creating your own mod or your own routes can be found on the github repository.