You can increase your Relationship with Haru by giving him a gift on his birthday.You can also increase your Relationship with a character by spending time with him and exchanging gifts with him on Christmas.If you didn't find needed cheats put request or ask question about this at special section of the game.Also you can subscribe on all new cheats that we'll find for you in the future!Raising your Relationship can be done by talking to them, giving them gifts and going on dates.
This page contains Love Hina Sim Date cheats list for PC version.
Note that if you start dating someone else, your other relationship will end.
Dates are a great way to increase your Relationship.
Like gift giving, you can't go on dates without talking to a character for a while.
Once you have enough successful dialogues with the character, a message letting you know that you can now go on dates with the character will appear.