This anime has quite an interesting setup for a good mystery even more so when other girls appear and some even pretending to be his sister creating more mysteries for the mc to solve. All is good for a great plot, there's only one problem with this: They fked it up.
When creating a mystery what you want to do is to leave clues for other people to guess and figure things out, not leaving the answer. That's exactly what this anime did, create a mystery ONLY TO GIVE AWAY THE ANSWER AT THE VERY NEXT SCENE making to whole thing pointless. While yes the main grand mystery only left clues and revealed itself in the end but the small one like the girls pretending to be his sister was handled very clumsily that it gave away itself faster then you can say "best waifu". Even when the anime tried to create a twist at later episodes it was also handled poorly giving away the answer before giving any clue.
Plot aside how about the rom-com? the characters? well...it's a somewhat a mixed bag. while some girls are likable and quite fun to watch but the creator made them into horny sluts who would strip and temped the mc to make love with them even when it made no sense to do so. "Childhood friends?" ok let me feed you "hard on pills" and sleep topless on your bed next to you. "Pretending to be lover?" sure let me strip naked at school in an empty room and climb on top of you. "Tomboyish girl?" an excuse for me to be literally naked in your room. This made scene that were meant to be relationship building between the mc and the love interests only to be fan service moment (yes some anime can do a good job with both relationship building and fan service, not in this anime though). What about Shougo? While he is a decent mc but he is also the dumbest smart person, he was able to solve the mysteries but at the same time had the tendency of giving away crucial/secretive information to complete strangers without even knowing them first.
This anime had so many potential with it's great setup and fun characters. what a disappointment.
