Hayate no Gotoku! Dream Apocalypse

In terms of how the "dating system" will be handled in the future, I've decided to implement something similar to that of the support system present in the Fire Emblem series.

The player will find items that raises the happiness stat of the girls throughout the quest. Once you have a girl's happiness stat above a certain value, an "affection" conversation will become available. These conversations will further develop the characters relationships in terms of the story, and in terms of gameplay, will boost their stats. Viewing an "affection" conversation will raise their "affection level", and a maximum of 5 levels can be achieved. With each new level, a new conversation will be available for viewing that will act as a sequel to the previous one. Also, the stat increase will also stack with each passing "affection level".
Reaching a level 5 "affection level" will mean that the two will finally become an official couple and alter the ending depending on who gets the level 5. Reaching level 5 will also mean that the two characters will be able to learn a cooperative tech that is unable to be obtained any other way.
The items that raises happiness will be scarce. In other word, it will be impossible to score level 5 "affection levels" for all the girls.
Sacrifices will have to be made. This also makes the game more interesting, as different "affection level" combos yield different stats for the characters.

For example:

let's say that there is only enough affectionate points to get one person to level 5, or two people to level 2 or four people to level 1.

If the player decides to boost Hayate x Hina to level 5, this will happen
Hayate will boost the HP of Hayate and Hina 5 levels.
Hina will boost the rate of fire of Hayate and Hina 5 levels.
They will learn their ultimate cooperative tech.

If the player decides to boost Hayate x Nagi to level 2 and Hayate x Sakuya to level 2, this will happen
Hayate will boost the HP of Hayate, Nagi, and Sakuya to level 2
Nagi will boost the SP of Hayate and Nagi to level 2
Sakuya will boost the Attack of Hayate and Sakuya to level 2
No one will learn any new techs.

Different combos of "affection levels" will yield very different stats.
For example
2,2,1
2,1,1,1
1,1,1,1,1
4,1
etc.