What are the characters referenced in the screenshot below, and what game(s) do they come from?
You can ignore the rest below - they are purely for informational purpose.
In chapter 4 of Spotted Flower1, in the scene where the granny suggests a name for the baby, she made references to the names of the girls in anime, and dating-sim games. Listing them in order of mention:
The surnames (Kaname, Miki, Tomoe, Sakura, Akemi) and then the first names (Madoka, Sayaka, Mami, Kyouko, Homura) of the 5 girls in Puella Magi Madoka Magica: Kaname Madoka (鹿目 まどか), Miki Sayaka (美樹 さやか), Tomoe Mami (巴 マミ), Sakura Kyōko (佐倉 杏子), Akemi Homura (暁美 ほむら).
The first names (Manaka, Rinko, Nene) of the 3 heroines in LovePlus: Takane Manaka (高嶺 愛花), Kobayakawa Rinko (小早川 凛子), Anegasaki Nene (姉ヶ崎 寧々).
Then the characters in the screenshot I put up, which I cannot identify.
Then the first name of 4 girls (Yui, Kyouko, Chinatsu, Ayano) from Yuru Yuri: Toshinou Kyouko (歳納 京子), Funami Yui (船見 結衣), Yoshikawa Chinatsu (吉川 ちなつ), Sugiura Ayano (杉浦 綾乃).
The protagonist noticed that the granny made sure to leave out Akaza Akari (赤座 あかり).
1 It is a story of a newlywed working otaku and his pregnant wife.