Yes, the main issue for me is that some CGs rely not only on different actions in the planning, but also on different choices as the kid, so you need to play again from the beginning. For example, there is a moment he is watching a show on the television, the choice you take there will determine if Yukari will use the student cosplay or the anime cosplay and then your actions on the planning will determine how this scene will play out.
Rascou also made hints and guides in his site, here:
Spreedsheet of regular events, first vertical column is day, second is night and horizontal columns are divided by study, sleep/free and tutor, try to use the proper action when there is something on a box:
http://rascou.vivian.jp/haha2_sche.pdf
HCG hints, the number before each line is the page and position of the CG in the recollection, if you have an older version of the game, you might not have and these scenes:
http://rascou.vivian.jp/haha2_replay.txt
Try to play in two ways, reaching the objective of the week and not reaching the objective of the week, notice that in week 4 and 5 the objective change, in these, you need to reach the points by doing the tutor activity. If you have a recent version of the game you can also save in the planning screen. Another thing, lookout for Touta fatigue, I think that it can't surpass 80 points, you can see some new (non-h) scenes if you keep him tired though.
Rascou said in a previous blog entry that he will try to put the hints in the game in future updates.