Summer Inaka no Seikatsu Episode 1 , English
A sudden call from his aunt explains that she is leaving her daughter home while she's away on a summer trip. However, since she is concerned of her wellbeing, she requests that her nephew go check up on her for the whole duration of the summer. Luckely for him, she has the biggest boobs in the world! And luckely for her, he can't say a single word!