https://www.pixiv.net/fanbox/creator/2722

Some rewards have already been shared and would not be shown in this gallery, please go to the link below:
http://e-hentai.fbk.tokyo/index/g/1498610/e024d8a36e/

Some rewards are games. Recently, some are made from TyranoBuilder, which is not possible to extract data. Nevertheless, Funa still provides direct game links.

Here are the links of the games unable to be decrypted (They could be played via Web browser or via smartphone.):

summer friend~ノンケパパとの情事~:
http://funa-funa.sakura.ne.jp/sum-erfnd/index.html

体験談：野球部 杉本君の場合:
http://funa-funa.sakura.ne.jp/taikenn-d-an-su-gimotover01/index.html

会社のデキる先輩のチンポ:
http://funa-funa.sakura.ne.jp/sen-pa-i01/index.html