These are complementary patches for somewhat completeness sake of this game to be added with https://sukebei.nyaa.si/view/1823228.
Simply drag it to the Koisuru game folder (or download it to the folder) and that’s it!
!!! Only in Japanese!
Contains the following patches:
Sweetest Summer https://vndb.org/r32005
Harem Hiyake Patch https://vndb.org/r33149
koirizo_suntan_patch http://www.pulltop-latte.jp/PL02.5/special01_campaign_summer.php
For more info here: https://sukebei.nyaa.si/view/1823439