First image:
Title: なつドキッ!
Getchu link: http://www.getchu.com/soft.phtml?id=792236
VNDB link: https://vndb.org/v14010
Second image:
Character name: chiriko / chiri
Artist name: ちり◆9/6こみトレ_イ18a
Pixiv link: http://www.pixiv.net/member_illust.php?mode=medium&illust_id=45444011