Fifteen-year-old Yamada has just entered high school and is gung ho about achieving her ultimate goal: to have one hundred sex partners! There’s just one problem: she’s a virgin, and she hasn’t even had a boyfriend! To get the ball rolling, Yamada decides to target a shy boy named Takashi from her school; but even though he is also a virgin and she ruthlessly aggressive with her feminine ways, it’s not as easy as Yamada hopes. Though they begin to have feelings for each other, will Yamada and Takashi ever get past first base?
The eccentric Suzumiya Haruhi wants nothing more than to meet aliens, time travelers and espers… but she’ll have to settle for the everyday Kyon instead! Along with the mysterious Itsuki and the vacant Mikuru, the duo forms the SOS Brigade – a club whose mission is to discover the mysteries of the world. Armed with a razor sharp wit and a skill for manipulation, Haruhi will stop at nothing to have fun at all costs, even at the expense of Mikuru’s dignity!
Both protagonists of "The Melancholy of Haruhi Suzumiya" and "B Gata H Kei" are girls who seem to be very lively and fun to be with. They know what they want and sometimes they don't care about other peoples feelings when they try to achieve their goals.
Somehow they also seem to like ordinary boys as their victims... :D
Ryuuji Takasu has an eventful life: his classmates think he's a delinquent due to his 'killer' eyes; his crush Minori seems ever out of reach; and he’s just had an unfortunate encounter with 'palm-sized Taiga' – a feisty and dainty wench in his class. With different cleaning habits and tempers, the two clash like night and day; that is, except for the fact that Taiga and Ryuuji have crushes on the other's good friend! With school rumors abounding, the duo must now work together to play matchmaker for each other. Who will end up with their true love?
B Gata is raunchier, but both shows are funny romances. They deal with high schoolers trying to decide who they like, having several prospects. Each show also has a strong female tsundere, overpowering the male.
Tatsuhiro Sato is a university dropout and a "hikikomori" – a person suffering from social withdrawal. To Sato’s dismay, his self-imposed exile from the world is rudely interrupted when a mysterious girl knocks on his door. She has charged herself with the task of curing Sato of his hikikimori ways! Now, as new problems ranging from hentai games to internet suicide spring up, can Sato manage to overcome his hermit-like ways, or will the imaginary N.H.K conspiracy force him to remain a hikikomori forever?
Both anime, NHK and B Gata, have a main plot dealing with a certain subject, but sort of an underlying social aspect regarding young male-female interaction, and the plight of a young undersexed boy/girl coming to understand their emotions.
While not dealing with the same core subjects, I believe there is quite a bit of core intrest overlap between the series'.
Following the war against Albion, Saito has returned to the Tristain Academy and is becoming increasingly closer to Louise. However, their newfound tranquillity is shattered when one day, the runes on the back of Saito’s hand disappear. Saito is now free from being Louise’s familiar, but not from her ‘explosive’ temper. Nevertheless, Saito refuses to leave Louise’s side and pledges to help her find a way to renew their contract and regain his powers. Soon, while on a mission to find the elf that revived Saito during the final battle against Albion, the duo encounters the mysterious Sheffield: a familiar of another void magic user. Why is Sheffield pursuing the pair and what plans does her master have for them?