Fruit of Grisaia (2014, Eight Bit)

Agent Yuuji "9029" Kazami wants to go to a "normal school" and he is transferred to Mihama Academy, a school with only 5 other students, all girls, all with their own quirky personalities including one that uses every chance to slash him. However, despite his cool nature, it doesn't take long for them to warm up to him as his elite...