Sasami is a recluse. She doesn't put in the effort to change clothes or eat. Taking care of her daily life is her older brother, who has a slave-like personality that Sasami absolutely despises. Sasami's daily routine involves peeking into the outside world through the "Brother Monitoring Tool" connected to her computer. In the outside world, her older brother is having a fun romantic comedy with three beautiful sisters... This is definitely wrong!! Something is off in this world! And then, Sasami is confronted with the 'Valentine's Day Tragedy', 'Special Event / All-Nude Gathering!', and 'Mini Game / Forbidden Nurse's Office...☆'!? I'm so tired, brother...