sensei ga oshiete ageru
桜待坂Stories Vol.2 せんせいがおしえてあげる
Visual novel by ivory, released 2005-06-24. Part of the Sakura Machizaka Stories series.
Character artists: Kani Biimu, Tsuzuki Maki (sub), Onomeshin (sub)
Main characters: Ko Sooyoung, Harley Sarasa Bastille, Ati Al-Rashid, Sera Ranevskaya